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Environmental Science 1/2 > Previously made Cards > Flashcards

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Biology 101 flashcards
1
Q
A
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2
Q

Explain why the hydrosphere is required on Earth

A

It is essential to life and all organisms depend on water for their metabolism

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3
Q

Why is water called a FINITE source?

A

Because the amount of water in, on, and above the planet does not change

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4
Q

List two factors that may contribute to the type and number of species present in an aquatic environment

A

the depth of the water, its temperature, and its salinity

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5
Q

Define Biosphere, Lithosphere, Atmosphere, and hydrosphere

A

Biosphere - All life on earth
Lithosphere - the solid, outer part of earth
atmosphere - the mixture of gases that surround Earth.
Hydrosphere - all water on earth

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6
Q

Define tectonic plates

A

Large mobile plates that continants and oceans rest on. These plates move very slowly and influence earth’s geological composition

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7
Q

List three types of rocks that make up the lithosphere and describe a feature of each

A

Igneous Rocks:

Feature: Formed from cooling magma or lava. Examples include granite (intrusive) and basalt (extrusive).
Sedimentary Rocks:

Feature: Created by sediment accumulation, showing distinct layers (bedding/stratification). Sandstone is an example.
Metamorphic Rocks:

Feature: Result from the transformation of existing rocks under high pressure and temperature, often displaying foliation. Slate is a foliated example.

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8
Q

Explain how volcanoes occur

A

collisions of tectonic plates pushing earth up and releasing heat from molten underneath

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9
Q

Define igneous rock types

A

Igneous rocks are rocks formed from melted magma or lava.

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10
Q

List the 4 most abundant gases found in the atmosphere in order of abundance.

A

Nitrogen, oxygen, argon, carbon dioxide

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11
Q

recall the layers of the atmosphere in order from closest to farthest.

A

Troposphere, Stratosphere, Mesosphere, Thermosphere, (exosphere)

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12
Q

In which layer of the atmosphere does all weather occur?

A

Troposphere

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13
Q

In which layer of the atmosphere is ozone most abundant

A

stratosphere

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14
Q

What is meant by the term TEMPERATURE INVERSION?

A

Temperature inversion is when the usual way temperatures drop as you go higher in the atmosphere gets reversed. In this situation, warmer air sits on top of cooler air, trapping pollutants and impacting the weather.

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15
Q

Why is the ozone layer beneficial to life on Earth?

A

Because ozone absorbs ultraviolet radiation from the sun and protects from UV damage.

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16
Q

Identify two ways the lithosphere, hydrosphere, atmosphere and biosphere interact.

A

All these spheres interact regarding the climate

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17
Q

What is the carbon-oxygen cycle?

A

the carbon-oxygen cycle describes the movement of carbon up the food chain and its return to the atmosphere.

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18
Q

What is a biogeochemical cycle?

A

the natural movement of elements or compounds through living things and the environment, like the air, soil, and water.

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19
Q

Describe the water cycle

A

The water cycle describe the continuous movement of water on, above, and below earth’s surface.

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20
Q

Define Sedimentary Rocks

A

Sedimentary rocks are formed from layers of tiny particles like sand, mud, or shells that have piled up and hardened over time.

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21
Q

Define Metamorphic rock types

A

Metamorphic rocks are rocks that have changed from their original form due to heat and pressure, often developing layers or patterns.

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22
Q

What is an open system?

A

An open system exchanges matter and energy with other systems (is not isolated from other systems)

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23
Q

Give an example of an open system

A

An ecosystem

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24
Q

What is a closed system?

A

A closed system is isolated from other systems in the environment. (doesn’t exchange matter but exchanges energy)

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25
Q

What is a semipermeable system?

A

A semipermeable system is like a middle ground between a closed and open system. It allows some energy and matter to move in and out, but it doesn’t freely exchange material with its surroundings.

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26
Q

Example of a semipermeable environment

A

A biological cell

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27
Q

What is a food chain

A

A single feeding pathway within ecosystems. Energy flow is represented by the arrows in the diagram

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28
Q

Describe a Producer (in terms of trophic level and role in the food chain)

A

A producer is represented on the first trophic level and is an autotroph in the food chain

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29
Q

Which trophic levels are described as heterotrophs?

A

Second trophic level, third trophic level, fourth tropic level (also described as consumers)

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30
Q

Example of an autotroph (1st trophic level, producer)

A

kangaroo grass

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31
Q

Example of primary consumer (second trophic level, heterotroph)

A

Eastern ringed xenica

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32
Q

Example of secondary consumer

A

snake

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33
Q

Example of tertiary consumer

A

wedge-tailed eagle

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34
Q

What is a biomass pyramid?

A

A biomass pyramid demonstrates the total try weight of living organic matter in a given area

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35
Q

What is a pyramid of numbers?

A

shows the number of organisms at each trophic level (doesn’t give an accurate picture of the amount of energy or biomass at each level)

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36
Q

What is soil?

A

Soil is a mixture of particles formed over a long period by the weathering of rocks and the remains of dead organisms.

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37
Q

What are the soil profiles in order from the highest to lowest?

A

Surface Litter
A horizon
B horizon
C horizon
Rock

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38
Q

What is the A horizon made up of?

A

Topsoil

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39
Q

What is the B horizon made up of?

A

Subsoil (usually coarser than the A horizon)

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40
Q

What is the C horizon made up of?

A

Parent material

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41
Q

What is a Terrestrial ecosystem?

A

a land-based ecosystem

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42
Q

What is an aquatic ecosystem?

A

Water-based ecosystem

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43
Q

What is Aerobic respiration?

A

Aerobic respiration is the process by which animals, fungi, microorganisms and plants break down glucose to produce energy.

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44
Q

Evaporation is the process of ________

A

water changing from liquid to gas

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45
Q

Transpiration occurs when ______

A

water evaporates from plants, mainly through their leaves

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46
Q

Condensation is the process of _________

A

changing water from gas to liquid

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47
Q

Precipitation refers to _____

A

the process after water vapour has condensed and falls from the sky is various forms (rain, snow, sleet, hail, etc.)

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48
Q

Infiltration occurs when _______

A

water that falls to the ground if soaked into the earth. This can collect and form groundwater.

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49
Q

Surface run-off occurs when _______

A

water does not soak into the ground, but instead flows across land.

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50
Q

Give examples of Biotic factors

A

Animals (such as mice, kangaroos, insects, birds etc.)
Plants
Decomposers

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51
Q

Give examples of Abiotic factors

A

Earth cycles
Wind
Sun
Atmosphere
Temperature

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52
Q

What is an ecosystem?

A

A community of living organisms interacting together with their non-living environment. Contains a number of communities

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53
Q

What is a community?

A

made up of different species that interact at a specific location

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54
Q

what is a habitat?

A

a place/location where an organism exists/lives

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55
Q

What is a species?

A

One singular type of animal of the same kind that can breed together

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56
Q

What is a population?

A

Group of organisms belonging to a species and living in one area. Made up of individuals

57
Q

what is predation?

A

Predation is when one animal hunts and eats another animal.

58
Q

What is symbiosis?

A

symbiosis is where two animals interact together and form a relationship. (mutualism, commensalism, paratism)

59
Q

What is photosynthesis

A

where plants convert sunlight to energy.

60
Q

Photosynthesis equation

A

6CO2 + 6H2O —(sunlight)-> 6O2 + C6H12O6

61
Q

what is a decomposer?

A

decomposers are heterotrophic organisms that break down and consume organic waste (mushrooms/fungi)

62
Q

What is a food web?

A

a food web shows the more complex relationship between producers and consumers

63
Q

What is the 10% rule?

A

Approximately 10% of the energy in one trophic level is available as food for the organisms in the next level.

64
Q

what is ecosystem productivity?

A

The productivity of an ecosystem depends on the amount of available nutrients and energy.

65
Q

What influences ecosystem productivity?

A

Influenced by a range of abiotic factors such as temperature, soil fertility and rainfall.

66
Q

What are the four main components of soil?

A

Water, Organic matter (humus), mineral matter, oxygen

67
Q

Examples of inorganic matter in soil

A

Rocks
Water
Elements

68
Q

Examples of organic matter in soil

A

Dead/decaying/decomposed organisms
Humus
Microorganisms/microbial life

69
Q

How does the texture of soil affect its properties?

A

it can affect its density, aeration, drainage and moisture retention.

70
Q

What is porosity (soil)

A

porosity refers to the size and numbers of the spaces (pores) between particles.

71
Q

what is the ideal water content in soil?

A

18-25%

72
Q

What is the difference between climate and weather?

A

weather refers to the atmospheric conditions of a specific place within a given time, whereas climate refers to the long-term weather conditions of a particular region.

73
Q

What is groundwater flow?

A

The movement of water beneath the Earth’s surface through porous rocks or soil, typically occurring in aquifers.

74
Q

Equation for Aerobic respiration

A

C6H12O6 + 602 —–> 6H2O + 6CO2 + energy

glucose oxygen water carbon dioxide

75
Q

what is the nitrogen cycle?

A

shows how nitrogen is changed into different forms as it’s recycled through the biosphere

76
Q

what is the order of the nitrogen cycle? Natalie never ate a dog

A

Nitrogen fixation
nitrification
Assimilation
ammonification
denitrification

77
Q

Explain Nitrogen fixation

A

This is the process of converting nitrogen into ammonia. plants cannot take up nitrogen in its gaseous form, but can as ammonia.

78
Q

What are two ways nitrogen fixation can take place?

A

Bacteria can fix nitrogen to form ammonia.
Lightning can fix nitrogen to for ammonia and nitrate.

79
Q

Explain nitrification

A

this is the process in which bacteria convert ammonia to nitrite ions and the nitrite ions to nitrate ions in a process called oxidation.

80
Q

Explain the process of assimilation in the nitrogen cycle

A

Plants absorb nitrates, nitrite, and ammonium that is formed when ammonia dissolves in soil moisture. Consumer then absorb the nitrogen present.

81
Q

what is ammonification

A

decomposers return nitrogen to the soil by converting nitrogen rich compounds in dead bodies and wastes to ammonia

82
Q

what is denitrification?

A

bacteria convert nitrate and nitrites into gaseous nitrogen, returning it to the atmosphere and continuing the cycle again.

83
Q

What is the phosphorus cycle?

A

the cycle of phosphorus through soil, sediments, organisms, and water.

84
Q

why is phosphorus important?

A

Phosphorus forms part of some molecules that control the flow of energy in cells. Is a component of cell membranes, bones and teeth

85
Q

what is the order of the phosphorus cycle? we are done my SAC

A

weathering
assimilation
decomposition
mineralisation
sedimentation

86
Q

what is weathering (phosphorus cycle)

A

when phosphate ions are released from rocks as a result from weathering, the inorganic phosphate is distributed in soils and water

87
Q

what is assimilation (phosphorus cycle)

A

plants take up inorganic phosphate from soil through their roots. once in the plant (or animal if consumed) the phosphate is incorporated into organic molecules (e.g DNA)

88
Q

What is decomposition (phosphorus cycle)

A

the decomposition of organic matter returns organic phosphate to the soil

89
Q

what is mineralisation (phosphate)

A

within soil, bacteria can break down organic forms of phosphate into inorganic phosphorus, making them available to plant

90
Q

what is sedimentation (phosphorus)

A

Phosphorus goes to the bottom of water, becomes sediment, and releases phosphate. Currents transport it to tiny plants (phytoplankton), and some sediment eventually turns into rocks.

91
Q

a wetland is an example of:

A

and aquatic ecosystem

92
Q

a system is best described as

A

anything that functions as a unified whole and relies on the interactions of inputs, outputs and processes

93
Q
A
94
Q

What is the carbon-oxygen cycle?

A

the carbon-oxygen cycle describes the movement of carbon up the food chain and its return to the atmosphere.

95
Q

Evaporation is the process of ________

A

water changing from liquid to gas

96
Q

Transpiration occurs when ______

A

water evaporates from plants, mainly through their leaves

97
Q

Condensation is the process of _________

A

changing water from gas to liquid

98
Q

Precipitation refers to _____

A

the process after water vapour has condensed and falls from the sky is various forms (rain, snow, sleet, hail, etc.)

99
Q

Infiltration occurs when _______

A

water that falls to the ground if soaked into the earth. This can collect and form groundwater.

100
Q

Surface run-off occurs when _______

A

water does not soak into the ground, but instead flows across land.

101
Q

What is groundwater flow?

A

The movement of water beneath the Earth’s surface through porous rocks or soil, typically occurring in aquifers.

102
Q

what is the nitrogen cycle?

A

shows how nitrogen is changed into different forms as it’s recycled through the biosphere

103
Q

what is the order of the nitrogen cycle? Natalie never ate a dog

A

Nitrogen fixation
nitrification
Assimilation
ammonification
denitrification

104
Q

Explain Nitrogen fixation

A

This is the process of converting nitrogen into ammonia. plants cannot take up nitrogen in its gaseous form, but can as ammonia.

105
Q

What are two ways nitrogen fixation can take place?

A

Bacteria can fix nitrogen to form ammonia.
Lightning can fix nitrogen to for ammonia and nitrate.

106
Q

Explain nitrification

A

this is the process in which bacteria convert ammonia to nitrite ions and the nitrite ions to nitrate ions in a process called oxidation.

107
Q

Explain the process of assimilation in the nitrogen cycle

A

Plants absorb nitrates, nitrite, and ammonium that is formed when ammonia dissolves in soil moisture. Consumer then absorb the nitrogen present.

108
Q

what is ammonification

A

decomposers return nitrogen to the soil by converting nitrogen rich compounds in dead bodies and wastes to ammonia

109
Q

what is denitrification?

A

bacteria convert nitrate and nitrites into gaseous nitrogen, returning it to the atmosphere and continuing the cycle again.

110
Q

What is the phosphorus cycle?

A

the cycle of phosphorus through soil, sediments, organisms, and water.

111
Q

why is phosphorus important?

A

Phosphorus forms part of some molecules that control the flow of energy in cells. Is a component of cell membranes, bones and teeth

112
Q

what is the order of the phosphorus cycle? we are done my SAC

A

weathering
assimilation
decomposition
mineralisation
sedimentation

113
Q

what is weathering (phosphorus cycle)

A

when phosphate ions are released from rocks as a result from weathering, the inorganic phosphate is distributed in soils and water

114
Q

what is assimilation (phosphorus cycle)

A

plants take up inorganic phosphate from soil through their roots. once in the plant (or animal if consumed) the phosphate is incorporated into organic molecules (e.g DNA)

115
Q

What is decomposition (phosphorus cycle)

A

the decomposition of organic matter returns organic phosphate to the soil

116
Q

what is mineralisation (phosphate)

A

within soil, bacteria can break down organic forms of phosphate into inorganic phosphorus, making them available to plant

117
Q

what is sedimentation (phosphorus)

A

Phosphorus goes to the bottom of water, becomes sediment, and releases phosphate. Currents transport it to tiny plants (phytoplankton), and some sediment eventually turns into rocks.

118
Q

What is a biogeochemical cycle?

A

the natural movement of elements or compounds through living things and the environment, like the air, soil, and water.

119
Q
A
120
Q

What does abiotic mean?

A

Non-living

121
Q

what does biotic mean?

A

living or once living

122
Q

What is an ecological niche?

A

An organism’s role in the environment

123
Q

What is an ecosystem?

A

the total of all the different organisms that depend on an interact with each other in a specific location.
The biotic and abiotic components of an specific place interacting

124
Q

What is a community made up of?

A

A community is made up of different species that interact in a specific location

125
Q

What is a population?

A

A group of organisms of the same species living in the same geographical area

126
Q

What is a biome?

A
127
Q

Describe a grasslands biome

A

Dry climate, cracked soil in summer, waterlogged soil in winter
tropical/savanna
Temperate: receives less rain

128
Q

Describe a forest biome

A

covers 1/3 of earth, supports a wide variety of plant and animal species
tropical
Boreal/taiga

129
Q
A
130
Q

What is an independent variable?

A
131
Q

What is a dependent variable?

A
132
Q

What is a controlled variable?

A
133
Q

What is a hypothesis?

A
134
Q

What is the best way to determine the appropriate investigation methodology?

A
135
Q

List investigation methodology:

A
  • Case study
  • classification and identification
  • controlled experiment
  • correlation study
  • fieldwork
  • literature review
  • modelling
  • product
  • process or system development
  • simulation
136
Q

What are the effects of varying sample sizes in obtaining robust data?

A
137
Q

what is qualitative data?

A
138
Q

what is quantitative data?

A
139
Q
A

Environmental Science 1/2 (5 decks)

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