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A Level Environmental Science (AQA) > Key Terms > Flashcards

Key Terms Flashcards

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Biology 101 flashcards
1
Q

Abiotic factors

A

Physical factors such as light, temperature and water.

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2
Q

Acidification

A

A process in which the pH drops as the conditions become more acidic.

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3
Q

Acidophile

A

An organism that thrives under acidic conditions. Many acidophiles are bacteria or archaea.

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4
Q

Acoustic deterrent devices

A

A device that deters mammals using sound. They are used to deter small cetaceans from fishing nets, or seals from fish farms, for example.

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5
Q

Acoustic fatigue

A

Stress cracking of a material caused by repetitive vibrations induced by sound.

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6
Q

Acoustic monitoring

A

Monitoring environmental sounds, eg to detect the presence of dolphins and whales or bats.

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7
Q

Activated carbon filter

A

A filter that reduces emissions of pollutants such as complex organic molecules that absorb onto the surface of activated carbon particles.

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8
Q

Activation products

A

Atomic nuclei that become radioactive because they have absorbed neutrons that change them into less stable nuclei that emit ionising radiation.

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9
Q

Active traffic management (ATM)

A

A method of controlling road lane usage and speed limits to smooth traffic flow and reduce congestion.

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10
Q

Acute

A

Exposure to a substance or symptoms that appear very rapidly.

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11
Q

Adsorption

A

The process where a substance fixes itself onto a surface.

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12
Q

Aerobic process

A

A process that takes place in the presence of oxygen.

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13
Q

Aerodynamics

A

The study of airflow over surfaces to allow the design of surfaces that reduce wind resistance, turbulence, friction and noise generation.

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14
Q

Afforestation

A

Planting trees to increase the area of a forest.

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15
Q

Albedo

A

A measure of the reflectivity of a surface. More reflective surfaces have higher albedo. A surface that reflects all light has an albedo of 100%, whereas a surface that absorbs all light has an albedo of 0%. The albedo of an area can affect the local climate.

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16
Q

Anaerobic process

A

A process that occurs in the absence of oxygen.

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17
Q

Antarctic Treaty (1959)

A

An international agreement signed by many countries to protect and manage Antarctica. Aspects of the treaty include control of military activities, waste disposal, mineral exploitation, wildlife conservation and tourism.

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18
Q

Anthropogenic

A

Adjective describing outcomes caused by human activity.

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19
Q

Aphotic zone

A

Deeper layers of water that receive no sunlight because they are absorbed by shallower layers.

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20
Q

Aquaculture

A

The artificial production of aquatic organisms, including fish farming.

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21
Q

Aquifer

A

A rock which contains water that is abstracted by humans.

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22
Q

Archaea

A

Microorganisms that are similar to bacteria, including the first life-forms to develop on Earth. Archaea are the only organisms that produce methane from the decomposition of organic matter.

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23
Q

Artificial Insemination

A

A form of selective breeding where semen is collected from a chosen male to be inserted artificially into the chosen female causing her to become pregnant. It also allows semen to be stored for later use or the transport of semen without having to bring the animals together.

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24
Q

As low as reasonably achievable (ALARA)

A

An approach to control of pollution, especially ionising radiation, where levels are kept as low as is practically achievable, taking into account economic and technological factors.

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25
Q

Atmosphere

A

The gases surrounding the Earth. Different layers are characterised by their temperature, density, turbulence and composition.

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26
Q

Baffle mounds

A

Embankments that absorb and deflect noise, especially around mines, airports and major roads.

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27
Q

Bag filter

A

A method of reducing atmospheric pollution caused by smoking and particulate matter.

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28
Q

Barrage

A

A dam built across an estuary to generate tidal power.

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29
Q

Barrier crops

A

A crop that is grown around another crop to protect the neighbouring crop, usually by producing a scent that deters the pest.

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30
Q

Beating tray

A

A method of sampling invertebrates on the branches of bushes and small trees.

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31
Q

Becquerel (Bq)

A

The becquerel is the unit of activity of a radioactive source. 1 Bq= 1 nuclear decay per second. It is usually related to a standard mass of material.

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32
Q

Best available technology not entailing excessive cost (BATNEEC)

A

An approach to pollution control where control technology is used that achieves the lowest emission levels, without costing so much that further marginal gains would risk their financial viability.

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33
Q

Bioaccumulation

A

The increase in concentration of a substance in living tissue as it is absorbed and then stored faster than it is broken down and excreted.

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34
Q

Biocapacity

A

A measure of the biological productivity of an area.

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35
Q

Biodegradable

A

A material that can be broken down by living organisms, usually bacteria.

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36
Q

Biodiversity

A

A measure of the variety and abundance of wildlife species. A common quantitative method of measuring biodiversity is Simpson’s biodiversity index.

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37
Q

Biogeochemical cycle

A

A series of linked processes that use and re-use elements such as carbon, nitrogen, phosphorus, iron and sulphur, as they move between biotic and abiotic reservoirs.

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38
Q

Bioleaching

A

A method of using bacteria to dissolve metals from low grade ores.

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39
Q

Biological control

A

The control of pests using living organisms, usually predators or pathogens.

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40
Q

Biological corridor

A

A habitat that links other habitats so that animals can move between them.

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41
Q

Biomagnification

A

The progressive bioaccumulation of a material along a food chain, eg organochlorine insecticides, PCBs and heavy metals.

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42
Q

Biomass

A

The total mass of living, or recently living material in an area.

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43
Q

Biome

A

A large geographical region with particular climate features, in which a characteristic, unique community of species, lives. Eg Taiga, coral reefs, temperate grassland, tropical rainforest, tundra. Don’t confuse the term biome and ecosystem. Biome refers to the total area where the community of species is found, whereas ecosystem refers to a particular community and its interactions. So there are many tropical rainforest ecosystems but only one biome.

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44
Q

Biomimetics

A

The study of living organisms so the knowledge gained can be applied to engineering or other technological developments.

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45
Q

Bioremediation

A

Cleaning up a contaminated site using organisms such as bacteria that chemically degrade the pollutants or plants that absorb the pollutants.

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46
Q

Biotic index

A

A measure of pollution based on the presence, abundance and state of health of selected living organisms, eg lichens for acid rain and aquatic invertebrates from water pollution.

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47
Q

Blue baby syndrome/ methaemoglobinaemia

A

A health problem with several possible causes, where the haemoglobin in a baby’s blood doesn’t carry enough oxygen. Nitrates in drinking water can be converted into nitrates which reduces the ability of haemoglobin to carry oxygen.

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48
Q

Bund Wall

A

A wall that surrounds a tank which would contain the contents if the tank leaked or burst.

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49
Q

Bycatch

A

The non target organisms that are caught when fishing.

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50
Q

Captive breeding and release programmes (CBR)

A

A method of boosting wild populations by keeping a breeding population in captivity. Some of the offspring produced may be released to join the wild population.

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51
Q

Carbon capture and storage (CCS)

A

A method to reduce carbon dioxide emissions, by removing the gases and storing them in underground geological structures.

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52
Q

Carbon footprint

A

An estimate of the total releases of greenhouse gases caused by the actions of an individual, group of people, an organisation or activity. The amounts of all greenhouse gases are expressed as the equivalent amount of carbon dioxide.

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53
Q

Carbon sequestration

A

Any process that removes carbon dioxide from the atmosphere, such as afforestation or underground storage (CCS).

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54
Q

Carcinogen

A

A substance or energy from that that can cause cancer.

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55
Q

Carrying capacity

A

The greatest population that can be supported sustainably in an area.

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56
Q

Catalytic converter

A

A device that reduces emissions of pollutant gases from petrol and diesel engines. Catalysts such as platinum, palladium and rhodium catalyse reactions with oxides of nitrogen, carbon monoxide and unguents hydrocarbons.

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57
Q

Catch quota

A

A limit on the quantity of fish that can be caught.

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58
Q

Centre of diversity

A

A geographical region with a high plant biodiversity, especially of the wild relatives of crop species.

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59
Q

Cetaceans

A

Marine mammals including whales, dolphins and porpoises.

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60
Q

Compact fluorescent lamp (CFL)

A

An early design of low energy light.

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61
Q

Chronic

A

Exposure to a substance or symptoms that appear over long periods of time.

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62
Q

Cirrus Clouds

A

Thin, wispy clouds, usually found at altitudes above 6000m. They can reflect infrared energy emitted by the Earth’s surface and emit infrared produced by absorbed sunlight.

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63
Q

Clean air act (1956)

A

UK legislation to control smoke pollution by the establishment of smoke zones by making control orders in large urban areas.

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64
Q

Climax community

A

The relatively stable community present at the end of ecological succession.

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65
Q

Cloning

A

An artificial form of asexual reproduction.

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66
Q

Cnidarian

A

A Taxon of animals that includes coral and jellyfish.

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67
Q

Colonisation media

A

A method of demonstrating the presence of species by providing places that they can colonise which can then be checked.

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68
Q

Combined heat and power station (CHP)

A

A power station that has a high overall energy efficiency because the heat energy from the condenser cooling water is harnessed and used, often for heating buildings.

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69
Q

Community of species

A

A community of species is made up of the populations of all the species living in a particular area.

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70
Q

Companion crops

A

These are crops that are grown together to benefit one or both crops, by actions such as providing nutrients, controlling pests or attracting beneficial insects.

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71
Q

Concentrating solar power (CSP)

A

A method of increasing the intensity of solar energy by using a parabolic array of mirrors to reflect the light onto a smaller area.

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72
Q

Constant descent angle

A

A method of approaching an airport where the aircraft descends at a constant angle, usually 3 degrees.

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73
Q

Contact action (pesticide)

A

A pesticide that kills pests by coming into contact with them after spraying. Unlike systemic pesticides, they are not absorbed and translocated around the crop.

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74
Q

Contamination

A

Pollution caused by the pollutant staying in contact or mixing with materials such as soil, atmosphere, water or living organisms.

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75
Q

Contour ploughing

A

A soil erosion control measure where land is cultivated by ploughing horizontal furrows along the contours of the land.

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76
Q

Convention on international trade in endangered species (CITES)

A

An international agreement that control the international trade of certain species of plants and animals and their products.

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77
Q

Cooling towers

A

A method of reducing the temperature of effluent water to reduce thermal pollution and deoxygenation.

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78
Q

Coppicing

A

The process of regularly cutting down tree branches close to ground level. The regrow then produces thin straight branches. It was traditionally done on a cycle of six to ten years for making fence and wall panels. Short-rotation willow coppice is now used as a biofuel.

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79
Q

Cradle to cradle design (C2C)

A

The concept of designing items such that all the materials used can be reused or disposed without leaving toxic or harmful wastes. The concept is based on the natural systems that recycle elements without depleting resources or causing harmful wastes to build up.

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80
Q

Critical group monitoring

A

A method of monitoring pollutants, particularly radioactive discharges, if the members of the public that are most at risk are safe, then so is everyone else.

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81
Q

Critical pathway analysis (CPA)

A

The prediction of the routes that an effluent will take in the environment, to assess pollution risk.

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82
Q

Crop rotation

A

The practice of growing a different crop in a field on a cycle of three, four or five years.

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83
Q

Crop wild relatives (CWRs)

A

These are wild plant varieties or species that are closely related to domesticated crops. CWRs may contain characteristics that can be used in crop breeding programs.

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84
Q

Cryosphere

A

All the frozen water on Earth.

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85
Q

CSS

A

Countryside stewardship scheme.

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86
Q

Culling

A

Reducing the population of a species by selective killing.

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87
Q

Cut-off ore grade (COOG)

A

The lowest purity of a mineral that can be exploited economically.

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88
Q

Cyclone separator

A

Equipment used to remove suspended particles from gaseous effluents.

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89
Q

DAFOR scale

A

A qualitative scale that judges the abundance or organisms. Initials stand for: Dominant, Abundant, Frequent, Occasional, Rare.

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90
Q

dB scale

A

A logarithmic scale used to measure sound levels.

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91
Q

Debt for nature swaps

A

These are agreements whereby an organisation agrees to pay part of a country’s debt in return for a commitment to a wildlife conservation program.

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92
Q

Decomposers

A

Organisms that break down dead organic matter, releasing nutrients in the process. Many bacteria and fungi are decomposers. They secrete enzymes onto the dead organic matter and absorb the products of digestion.

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93
Q

Deflected succession

A

Natural ecological succession is stopped by human actions. Long-term continuation of the actions that deflect succession will create a plagioclimax.

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94
Q

Deforestation

A

The action of removing trees, resulting in a reduction of forest area.

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95
Q

Degradability

A

The measure of the ease with which a mineral breaks down.

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96
Q

Dermersal

A

Living on the seabed, eg cod, plaice.

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97
Q

Dendrochronology

A

The method of determining the age of a piece of wood using the characteristic sequence of sizes of growth rings in the wood.

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98
Q

Desulfurisation

A

The removal of sulphur or compounds containing sulphur such as sulphur dioxide.

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99
Q

Detritivores

A

These are heterotrophic animals that ingest and digest dead organic matter. Examples include earthworms, millipedes, woodlice, dung beetles and slugs. They often break up the dead organic matter into smaller pieces, providing access to decomposers.

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100
Q

Directional drilling

A

The drilling of wells for oil or gas that are not vertical.

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101
Q

Dolphin pingers

A

A type of acoustic deterrent device used to deter small cetaceans so they don’t get caught in fishing nets.

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102
Q

Drift net

A

A net that hangs vertically in the water. The top is held at the surface by floats, with the bottom being held down by weights.

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103
Q

Dry flue-gas desulfurisation (dry FGD)

A

A method of removing sulphur oxides from effluent gases using a slurry of crushed lime (mainly calcium carbonate).

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104
Q

Dynamic equilibrium

A

A balance created by active processes whose impacts cancel each other out.

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105
Q

Ecological footprint

A

A method of assessing the sustainability of lifestyles by estimating the biologically productive area needed to provide the resources and services needed by an individual or group.

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106
Q

Ecological niche

A

The role an organism plays in its habitat, including its use of resources and inter-relationship with other species.

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107
Q

Ecological succession

A

The sequence of changes in a community composition which changes as an area is colonised and devolved until a climax community is eventually produced. The time period in which a species can survive depends upon the ease with which it colonises and the biotic and abiotic conditions that it is able to survive.

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108
Q

Ecosystem

A

The community of organisms living in an area, their inter-relationships and interactions with their abiotic environment eg tropical rainforest, Savannah grassland, coral reef. Don’t confuse this term with biome.

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109
Q

eDNA

A

This is DNA that is detected in environmental samples such as water or soil that is used to confirm the presence of a species that produced it.

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110
Q

Efficiency

A

A measure of the amount of products compared with the inputs usually expressed as a percentage.

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111
Q

El Niño

A

The name given to events when the wind and ocean currents across the equatorial Pacific Ocean slow significantly or reverse. It alters heat distribution and weather patterns in the Pacific area and elsewhere in the world. They are caused by natural processes but may be made more frequent by human activities. It is also called ENSO: El Niño Southern Oscillation.

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112
Q

Electrostatic precipitator

A

Equipment used to remove suspended particles from gases effluents by attracting them to electrically charged wires or plates.

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113
Q

Embodied energy

A

The amount of energy that was used to make and install an item.

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114
Q

Embryo transfer

A

The transfer of fertilised eggs or embryos from one female to another., such as from a rare species into a female of a closely related species that is more common. This enables more young to be produced than could be achieved through normal breeding. It is also used in livestock breeding.

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115
Q

Encapsulation

A

The sealing of waste in a solid material such as glass, cement or plastic to prevent its escape.

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116
Q

Endemic

A

An endemic species is indigenous to a particular area and is not naturally found elsewhere. (It is also used is disease epidemiology to mean a disease that is normally present.

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117
Q

Energy density

A

The amount of energy in a particular mass of fuel or that can be harnessed by a particular mass of equipment.

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118
Q

Eradication

A

The reduction of a population of a species by removal or culling.

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119
Q

Escape panels

A

A spring loaded part of a fishing net through which large by-catch organisms can escape. Eg turtles.

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120
Q

European Union Common Fisheries Policy (EU CFP)

A

This is a set of regulations intended to ensure the sustainable management of fish stocks within the EU.

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121
Q

Eutrophication

A

The process by which nutrient levels in a water body increase to excessive levels such that the growth and subsequent die-off of plants and algae cause deoxygenation.

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122
Q

Evolutionarily distinct and globally endangered (EDGE) species

A

These are species that are threatened with extinction and have few relatives that are genetically similar. This genetic uniqueness means they should be a high priority for conservation.

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123
Q

Exoskeleton

A

A skeleton on the outside of an organism, as found in insects and crustaceans.

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124
Q

Exposure

A

In ionising radiation control, this refers to an object or person receiving radiation, but not necessarily coming in contact with the source.

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125
Q

Ex-situ conservation

A

The conservation of a species in an area, which is not its natural habitat.

126
Q

Extensive agriculture/ aquaculture

A

Agriculture/ aquaculture where the yield is achieved with low levels of inputs, often over a larger area. Productivity is usually low (yield per unit area) but efficiency is usually high (yield per unit input).

127
Q

Feedback mechanisms

A

A process where an action has consequences that affect the original process. Positive feedback mechanisms increase the rate of the original action while negative feedback mechanisms reduce it.

128
Q

Flagship species

A

High-profile species that can be used to raise support for the conservation of their habitat and all the other species that live there.

129
Q

Flue Gas Desulfurisation (FGD)

A

A process that removes oxides of sulphur from gaseous effluents.

130
Q

Food conversion ratios (FCRs)

A

A measure of the efficiency with which an organism converts its food into its own increasing biomass. FCR = mass of food needed to produce one unit of new tissue.

131
Q

Fuel cell

A

An electrochemical device that produces electricity from the chemical reaction between two substances, usually hydrogen or an alcohol and oxygen.

132
Q

Genetic engineering/ genetic modification (GM)

A

The method of altering an organism’s genetic make-up by artificially introducing genes from another organism, often of another species.

133
Q

Ghost fishing

A

The capture and death of organisms that get caught in lost or discarded fishing gear.

134
Q

Gibberelins

A

A group of plant hormones.

135
Q

Gonadic

A

Relating to ovaries or testes.

136
Q

Gravimetry

A

A geological exploration technique that detects changes in the force of gravity.

137
Q

Grays

A

A unit of energy absorbed by ionising radiation.

138
Q

Greenhouse gas (GHG)

A

A gas that absorbs infrared radiation emitted by the Earth’s surface and causes atmospheric heating. Carbon dioxide and water vapour are the main naturally occurring greenhouse gases. Anthropogenic greenhouse gases include carbon dioxide, methane, NOx, CFC’s and tropospheric ozone.

139
Q

Haber process

A

The industrial process that combines nitrogen from the air with hydrogen from natural gas to produce ammonia.

140
Q

Habitat

A

The place where an organism, species or population lives.

141
Q

Haemoglobin

A

The protein in red blood cells that carries oxygen.

142
Q

Half life.

A

The time taken for half of a material to be lost or broken down.

143
Q

Halophyte

A

An organism that thrives in conditions with a high salt concentration.

144
Q

Hard release

A

The release of animals from captivity where they are not provided with post-release support such as food.

145
Q

Homeostasis

A

The maintenance of a state of equilibrium.

146
Q

Horizontal axis wind turbines (HAWT)

A

Wind turbines where the blades rotate around a generator that has a horizontal axis of rotation.

147
Q

Hydraulic fracturing

A

A method using high pressure fluids to open cracks in fine-grained shales to allow trapped oil and gas to flow so that it can be extracted.

148
Q

Hydroelectric power

A

A method of generating electricity using the downhill flow of water to turn turbines and generators.

149
Q

Hydrodynamics

A

The study of the flow of water, often in relation to ship design to reduce resistance to movement to reduce fuel use.

150
Q

Hydrogen economy

A

The proposal that hydrogen produced by electrolysing water could be used as the main fuel to meet a country’s energy demands.

151
Q

Hydrology

A

The study and understanding of the movement distribution and properties of water in the environment.

152
Q

Hydrosphere

A

All the water on Earth, found in solid, liquid or gaseous form in a variety of reservoirs, including the oceans, ice caps, rivers and lakes, groundwater, atmosphere and living organisms.

153
Q

Hydrothermal Deposition

A

The deposition of mineral deposits from hot mineral-rich solutions.

154
Q

Incineration

A

The breakdown of waste by burning it.

155
Q

In-situ conservation

A

The conservation of a species in its natural environment.

156
Q

Insolation

A

Sunlight that reaches a particular location.

157
Q

In-stream turbines

A

Tidal turbines that are rotated by marine currents, but without having a barrage to focus the water flow.

158
Q

Intensive agriculture/ aquaculture

A

Agriculture/ aquaculture where the yield is achieved with high levels of inputs. Productivity is usually high (yield per unit area) but efficiency is usually low (yield per unit input).

159
Q

International tropical timber organisation (ITTO)

A

An intergovernmental organisation that promotes the conservation and sustainable management, use and trade of tropical forest resources.

160
Q

International union for conservation of nature (IUCN)

A

This is an organisation of 1300 government and non-governmental organisations that provides information on the status of the natural world and the measures needed to safeguard it. Meetings every four years drive their global agenda and have produced major agreements such as CITES and the Ramsay convention.

161
Q

International whaling commission (IWC)

A

An international organisation that aims to ensure the sustainable exploitation of whales.

162
Q

Keystone species

A

A species that has much more important ecological functions within their ecosystem than their abundance might suggest. Such roles may include the control of the population of other species, the provision of food or species that control structural habitat features, such as beavers creating dams.

163
Q

Kick sampling

A

A method of sampling aquatic invertebrates by disturbing the substrate.

164
Q

Kinetic energy recovery system (KERS)

A

A method of slowing a vehicle by using the kinetic energy of the vehicle to turn a flywheel or charge batteries. The stored energy is used for acceleration, which reduces the amount of fuel that needs to be used.

165
Q

K-selected species

A

Species that have a relatively low breeding capacity: they often mature at a later age and have few young.

166
Q

La Niña

A

The name given to events where wind and ocean currents in the equatorial Pacific Ocean increase in strength. Also see El Niño.

167
Q

Laser fusion

A

A developmental nuclear fusion technique that uses a laser beam to cause fusion in beads of frozen hydrogen.

168
Q

Lasky’s principle

A

The theoretical model stating that as the purity of available mineral deposits declines in a linear fashion, there is a logarithmic increase in the amount of the material present.

169
Q

Leachate

A

Drainage water that carries other substances, either in solution or as suspended solids.

170
Q

LED (light emitting diode)

A

These are very energy efficient lights.

171
Q

Legumes

A

Plants with symbiotic nitrogen fixing bacteria in root nodules, such as beans or peas.

172
Q

Light traps

A

A method of sampling populations of night flying organisms that are attracted to light, especially moths.

173
Q

Limecrete

A

An alternative to concrete that has a much lower embodied energy because it uses calcium hydroxide rather than cement.

174
Q

Lincoln index

A

A catch, mark, release and recapture method of estimating animal populations.

175
Q

Liposolubility

A

A measure of how easily a substance dissolves in fats and oils.

176
Q

Lithosphere

A

The relatively hard outer layer of the Earth comprising the crust and upper layer of the mantle. It is the source of mineral resources such as metal ores and affects soil formation and properties.

177
Q

Local nature reserve (LNR)

A

They are designated under the National Parks and Access to the Countryside Act (1949) for their local importance for wildlife, geology, education or public employment. They are controlled or owned by local authorities.

178
Q

Long lining

A

A fishing method with many hooks attached to a main fishing line that is trailed behind the fishing boat. They can be used to catch pelagic or demersal fish.

179
Q

Magnetometry

A

A method of detecting mineral deposits based on their magnetism.

180
Q

Magnetosphere of Earth

A

The magnetic field around Earth, which deflects charged particles travelling from the sun.

181
Q

Marine conservation zone (MCZ)

A

MCZ’s are designated under UK law to protect a range of nationally important marine wildlife, habitats, geology and geomorphology, and can be designated anywhere in English or Welsh territorial and offshore waters.

182
Q

Marine nature reserve (MNR)

A

MNR’s were designated under the Wildlife and Countryside Act (1981) by Natural England (or CCW). Lundy island and Skomer island were MNR’s. They have been re-designated as Marine Conservation Zones.

183
Q

Marine protected area (MPA)

A

A general name for marine areas that are protected for their wildlife, historical and cultural features. The legal protection is provided by the laws of the country involved.

184
Q

Maximum sustainable yield (MSY)

A

The greatest amount that can be harvested sustainably.

185
Q

Metamorphic processes

A

Geological processes that change the form of a rock with heat and/or pressure, but without melting it.

186
Q

Methane hydrate

A

A solid compound of methane trapped in ice crystals, often found in marine sediments.

187
Q

Monoculture

A

The growth of a single type of crop, usually over a large area.

188
Q

Montreal protocol

A

The international agreement that controlled the manufactured and use of CFC’s and other ozone depleting substances.

189
Q

Mulch

A

Material placed on the soil surface to reduce evaporation losses and reduce weed growth.

190
Q

Multicropping

A

A form of polyculture where two or more crops are grown in an area at the same time.

191
Q

Mutagen

A

A material that can cause changes in DNA structure.

192
Q

National nature reserve (NNR)

A

They are designated under UK law by the National Parks and Access Countryside Act (1949). They include important habitats with complete communities of species. They are designated by Natural England or (CCW).

193
Q

Natura 2000

A

A network of protected sites in the EU that combine the SPA’s and SAC’s set up under the EU birds and habitats directives.

194
Q

Neonicotinoids

A

A widely used group of insecticides. They have been linked with the deaths of bees, especially when they act Synergistically with some fungicides.

195
Q

Neurotoxin

A

A poison that affects the nervous system.

196
Q

No take zone

A

An area in which harvesting or fishing is prohibited.

197
Q

Nuclear fission

A

Nuclear power that involves the splitting of the nuclei of large atoms such as uranium 235 and plutonium 239.

198
Q

Nuclear fusion

A

Nuclear power that involves the joining of the nuclei of two small atoms such as hydrogen 2 (deuterium) and hydrogen 3 (tritium).

199
Q

Nuclear power

A

An energy resource that releases large amount of energy by the destruction of very small amounts of matter from atomic nuclei.

200
Q

ODS

A

Ozone depleting substance.

201
Q

Oil shales

A

Fine sedimentary rock that contains kerogen, a solid form of crude oil.

202
Q

Organochlorines

A

Hydrocarbon- based compounds that include chlorine. They include pesticides such as DDT and industrial chemicals such as PCBs. Their use is now banned or restricted.

203
Q

Organophosphate pesticide

A

Insecticide group eg parathion, malathion. They are not persistent but have high mammalian toxicity.

204
Q

Overburden

A

The soil and rock above a mineral deposit that must be removed to provide access.

205
Q

Overfishing

A

Fishing above the maximum sustainable yield of the population.

206
Q

Ozone layer

A

The region of the stratosphere with higher concentrations of ozone.

207
Q

Pantograph

A

The electricity pick-up on the roof of a locomotive that allows the use of electricity from overhead cables.

208
Q

Pathogens

A

Organisms that cause disease.

209
Q

Peak shaving

A

The process of storing surplus energy to satisfy later peaks in demand.

210
Q

Peat bog

A

A wetland area with an accumulation of dead plant material, especially moss.

211
Q

Pelagic

A

Living near the water surface, e.g herring and Tuna.

212
Q

Permaculture

A

An agricultural system that incorporates the principles of natural ecosystems.

213
Q

Permafrost

A

A layer of soil in which the water is permanently frozen, often trapping bubbles of gases such as methane.

214
Q

Persistence

A

A measure of the rate at which a material breaks down and therefore the length of time it remains.

215
Q

Pheromone trap

A

A trap that attracts organisms using the scent of pheromones. They can be used to try and catch all the members of one gender of a species to stop breeding, but are usually used to show the presence of a pest species.

216
Q

Pheromone

A

A chemical released by an organism that changes the behaviour of other members of the same species, especially to attract a mate.

217
Q

Photic layer

A

The water layer into which light can penetrate.

218
Q

Photoautotroph

A

An organism that produces high-energy food substances using sunlight in photosynthesis.

219
Q

Photochemical smogs

A

Atmospheric pollution events in which pollutants such as hydrocarbons, NOx and tropospheric ozone interact to produce more toxic pollutants such as PANs (Peroxy Acetyl Nitrates).

220
Q

Photothermal

A

A systems that converts light into heat.

221
Q

Photovoltaic (PV)

A

A system that converts light into electricity.

222
Q

Phytomining

A

A method used to extract metals that have been absorbed and concentrated by plants. It can be used to exploit low purity metal deposits or decontaminate polluted areas.

223
Q

Phytoremediation

A

A method of decontaminating a polluted site by growing plants that absorb toxic materials.

224
Q

Pioneer species

A

One of the first species to colonise an area at the start of ecological succession. They are usually well adapted to extreme abiotic factors.

225
Q

Pitfall trap

A

A method of sampling mobile animals that live on the soil surface, by collecting individuals that fall into traps set in the ground.

226
Q

Plagioclimax

A

A community of species that does not develop a natural climatic climax community, but is maintained by external influences which prevent this, including human activities such as burning, grazing or ploughing.

227
Q

Ploughing

A

The cultivation of the soil by turning over the surface layer.

228
Q

Plutonium reactors

A

Nuclear fission reactors that use plutonium as the fissile fuel.

229
Q

Polar vortex winds

A

Winds that blow around the north and south poles in a circular manner which reduce the mixing of polar air masses with the rest of the atmosphere.

230
Q

Pollarding

A

The process of regularly cutting down tree branches above ground level, usually to prevent the regrowth being eaten by animals such as livestock and deer. It is usually done on a cycle of 5 to 30 years.

231
Q

Pollen analysis

A

The use of pollen present in environmental samples. This can be used to deduce the climate when historical sediments were deposited.

232
Q

Polyculture

A

An agriculture/aquaculture system involving the growth of more than one species in the same area at the same time.

233
Q

Population

A

All the individuals of a species living in a particular area.

234
Q

Power to gas systems (P2G)

A

A method of using surplus electricity which would be wasted to produce methane gas.

235
Q

Primary oil recovery

A

The extraction of crude oil where the oil is forced to the surface by the pressure of water beneath the oil or natural gas above or dissolved in the oil.

236
Q

Productivity

A

A measure of the yield of a system, often expressed as the yield per unit area, time or input.

237
Q

Proterozoic marine sediments

A

These include the iron oxide deposits produced by the reaction of dissolved iron minerals with the oxygen produced by photosynthesis. This occurred in the early Proterozoic era and delayed the build up of oxygen in the atmosphere.

238
Q

Proxy data

A

The use of data that can be collected to predict the values of a related factor that can not be measured, eg data from tree rings, pollen, coral growth and plankton in marine sediments can be used to determine historical climates.

239
Q

Pumped storage HEP

A

An energy storage system where surplus electricity is used to pump water from a low reservoir to a higher one. The energy stored as gravitational potential energy is allowed to flow downhill to generate electricity during periods of high electricity demand.

240
Q

Purse seining

A

A fishing method where a net is used to encircle a shoal of pelagic fish.

241
Q

Pyrethroids

A

Synthetic insecticide pesticides, based on the natural chemicals originally extracted from chrysanthemum flowers (pyrethrins). They are not persistent and have low mammalian toxicity.

242
Q

Quadrat

A

An area, usually square or circular, in which samples are taken. The size of the Quadrat depends on the organism being studied.

243
Q

Rammed earth

A

A wall construction method where materials such as clay, soil, straw and sand are compacted. Because no cement is used it has a low embodied energy.

244
Q

Ramsar site

A

A wetland site designated to protect its biodiversity under an international agreement: The Ramsar convention in wetlands (1971), especially as a habitat for water birds. They are designated in the UK by DEFRA.

245
Q

Range of tolerance

A

The range of conditions within which a species can survive.

246
Q

Relative biological effectiveness (RBE)

A

This is a measure based on the amount of energy absorbed from ionising radiation which takes into account the damaging effects of the type of radiation.

247
Q

Remote sensing

A

Any method of monitoring the features of a location from another location, normally used to describe surveys from satellites or high-flying aircraft.

248
Q

Resistivity

A

A method of predicting the mineral composition of mineral deposits underground using the ease with which they conduct electricity.

249
Q

Reverse thrusters

A

A method used on most aircraft to slow down after landing.

250
Q

Re-wilding

A

The process of creating habitats that are similar to the conditions present before the natural habitat was changed by hipuman activities.

251
Q

Risk:benefit analysis

A

A method to inform decision making by comparing the risks of carrying out an activity and benefits of doing so.

252
Q

r-selected species

A

Species that have a relatively high breeding capacity. They often mature at a young age and have large numbers of young.

253
Q

Salinity

A

A measure of the salt concentration of the solution.

254
Q

Satellite imagery

A

The collection of images using satellites: visible light, infrared, microwaves etc.

255
Q

Secondary fuel

A

An energy source that is produced by the conversion of a primary fuel.

256
Q

Secondary oil recovery

A

The extraction of crude oil where pressure is maintained by pumping water or natural gas into the oil reservoir.

257
Q

Secondary succession

A

Ecological succession that takes place in an area where the existing climax community has been disturbed or destroyed.

258
Q

Seismic surveys

A

These use sound waves produced at the surface that reflect off underground geological structures to determine the depth and shape of the rock structures. The reflected sound waves are detected by geophones at the surface.

259
Q

Sere

A

A stage in ecological succession in the changes that occur, eventually producing the climax community.

260
Q

Shellfish

A

All the aquatic animals that are caught or grown to be eaten that have shells or an exoskeleton eg, crustaceans and molluscs.

261
Q

Sievert

A

A unit of absorption of ionising radiation that takes into account the amount of energy absorbed and the Relative Biological Effectiveness of the type of radiation.

262
Q

Simpson’s index of biodiversity

A

A quantitative measure of the number of species and the abundance of each in an area.

263
Q

Site of special scientific interest (SSSI)

A

SSSI’s are designated by Natural England (or CCW) under UK law by the Wildlife and Countryside Act (1981) because of their importance for plants, animals, geological features or land forms.

264
Q

Smart motorways

A

A method of relieving traffic congestion which allows driving on the hard shoulder and reduces the speed limit during heavy traffic flows.

265
Q

Smog

A

Atmospheric pollution event involving smoke and fog.

266
Q

Soft release

A

The release of animals from captivity where they are provided with post release support such as food.

267
Q

Somatic

A

An issue related to general body cells, but not the gonads (overies and testes).

268
Q

Sonograms

A

A graph showing the volume of sounds at different frequencies.

269
Q

Special area of conservation (SAC)

A

SAC’s are designated by Natural England (or CCW) under the EU habitats directive to protect internationally important habitats for rare and vulnerable species.

270
Q

Special protection area (SPA)

A

SPA’s are designated by Natural England (or CCW) under the EU birds directive to protect areas for rare or vulnerable bird species.

271
Q

Species

A

A group of organisms that resemble each other more than other organisms and naturally interbreed to produce fertile offspring.

272
Q

Sterile male techniques

A

A method of insect pest control that uses the release of males that have been sterilised. If they mate, then no offspring will be produced.

273
Q

Strip cropping

A

The growth of more than one crop in alternating narrow strips, so that different sowing and harvesting times reduce soil erosion because the whole field is never all bare at the same time.

274
Q

Surber sampler

A

A method of sampling aquatic invertebrates by disturbing the substrate that produces more reliable quantitative data than kick sampling.

275
Q

Sweep nets

A

A method of sampling populations of flying insects and invertebrates among vegetation.

276
Q

Synergism

A

The process where the presence of two materials produces a greater effect than the sum of their individual effects.

277
Q

Systemic

A

A substance that is absorbed and transported throughout an organism eg by sap in plants.

278
Q

Tar sands

A

Very viscous crude oil found in sand.

279
Q

Taxon

A

A group of organisms based on their biological similarities, eg domain, kingdom, phylum, class, order, family, genus, species.

280
Q

Temperature inversion

A

A situation in the troposphere where the temperature is lower than normal so that relatively warm air lies above cold air.

281
Q

Teratogen

A

A substance that interferes with gene function in a growing embryo so that a non-inherited birth abnormality is produced.

282
Q

Terracing

A

The replacement of a sloping landscape by the creation of a series of narrow horizontal stepped strips, often used to reduce soil erosion.

283
Q

Tertiary oil recovery

A

The extraction of crude oil where the viscosity of the oil is reduced using methods such as the injection of steam, solvents or bacteria.

284
Q

Thermal mass

A

A measure of the ability of a material or structure to absorb and store heat.

285
Q

Thermal stratification

A

The changing temperatures in different layers of the atmosphere.

286
Q

Thermohaline circulation

A

The movement of ocean currents caused by changes in temperature, salinity and density.

287
Q

Thorium reactor

A

A reactor that uses thorium 232 as a fertile fuel. Neutron bombardment converts thorium 232 into uranium 233, which is fissile and releases energy.

288
Q

Tidal barrage

A

A tidal power scheme where a dam-like barrage is built across a bay or an estuary so that all flowing water flows through the sluice tunnels in the barrage causing the turbines and generators to turn.

289
Q

Tidal lagoon

A

A tidal power scheme where a section of a bay or estuary is impounded by a seawall, which has sluice tunnels and turbines like a tidal barrage. The environmental impacts are lower than those of a barrage as it only covers part of the bay or estuary.

290
Q

Tidal power

A

A method of generating electricity using the tidal water flow caused by the gravitational forces between the moon and Earth.

291
Q

Tied ridging

A

A method of reducing soil erosion by creating a grid of raised ridges that cause rainfall to collecting, increasing infiltration and reducing run off.

292
Q

Tillage

A

The cultivation by turning the soil, eg by ploughing.

293
Q

Tipping point

A

A tipping point is reached when the changes caused by human activities cause further changes such that the human activities are no longe needed to maintain the changes.

294
Q

Topography

A

The 3D shape of the land surface.

295
Q

Toroidal reactor

A

A nuclear fusion reactor in which hydrogen plasma is held in a torus: a ring-shaped tube.

296
Q

Toxicity

A

A measure of how poisonous a substance is, usually caused by its ability to cause enzyme inhibition.

297
Q

Transect

A

A line or belt of sampling sites across an area.

298
Q

Transgenics

A

The process of artificially transferring genetic material from one organism into an individual of another species.

299
Q

Tüllgren funnel

A

A piece of equipment used to extract invertebrates from soil or leaf litter.

300
Q

Turbidity

A

A measure of the level of suspended solids in water, which affects the ability of light to penetrate the water.

301
Q

Universal soil loss equation (USLE)

A

A formula that can be used to calculate rates of soil erosion.

302
Q

Urea spray

A

A method of reducing NOx emissions, eg from coal-fired power stations.

303
Q

Vavilov centre

A

An area of the world, identified by the Russian zoologist Nikolai Vavilov, where crop plants ere first domesticated and where wild varieties are still found.

304
Q

Vegetative propagation

A

Asexual reproduction.

305
Q

Vehicle to grid systems (V2G)

A

An energy storage method in which batteries in vehicles are connected to the local electricity grid. If there is a shortage of electricity from other sources, a proportion of the energy from the batteries can be used to maintain supplies.

306
Q

Vertical axis wind turbines (VAWT)

A

Wind turbines where the blades rotate around a generator that has a vertical axis of rotation.

307
Q

Wave power

A

A method of generating electricity using the movement of water caused by winds blowing over the water surface.

308
Q

Wet FGD

A

A method of removing sulphur oxides from effluent gases by dissolving them in a solution such as a spray of sodium sulphite solution.

309
Q

Wildlife and Countryside Act (1981)

A

A UK law that provides protection for many wildlife species and designated protected areas such as SSSI’s. Most birds and many mammals are protected.

310
Q

Windbreaks

A

Hedgerows and rows of trees that reduce wind velocity to reduce soil erosion.

A Level Environmental Science (AQA) (1 decks)

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