Science - Bio

Question 1

sustain

Answer 1

to allow something to continue for a long period of time.

Question 2

What is the greatest threat to sustaining life forms on earth?

Answer 2

human impact

Question 3

ecosystem

Answer 3

all the organisms in an area that interact with each other and their environment of energy and matter.

Question 4

detritus

Answer 4

waste from plants and animals, including their dead remains.

Question 5

decomposers

Answer 5

organisms that feed on detritus and releasing nutrients to the soil.

Question 6

trophic level

Answer 6

energy level

Question 7

autotroph

Answer 7

self producer of energy

Question 8

heterotroph

Answer 8

a consumer of energy.

Question 9

Why are pyramids used to represent three things in Biology?

Answer 9

The base is wide and it narrows towards the top, showing a decrease.

Question 10

Pyramid of Numbers

Answer 10

the number of organisms at each level of the food chain. (decreases as you go up)

Question 11

Pyramid of Energy

Answer 11

the amount of energy at each level. (decreases as you go up)

Question 12

What is the 10% Law of Energy Transfer

Answer 12

Only about10% of food energy is converted to new tissue and is transferred to the next consumer.

Question 13

Pyramid of Biomass

Answer 13

The total mass of a population of an organism in an area. (decreases as you go up).

Question 14

population

Answer 14

a group of the same species in a particular area, at a certain time.

Question 15

carrying capacity

Answer 15

the largest population of a species that an environment can support.

Question 16

Limiting factors that determine the carrying capacity?

Answer 16

predators, climate, disease, water, pollution, competition, parasites.

Question 17

productivity

Answer 17

the average amounts of new plant biomass produced each year in a given area.

Question 18

climate

Answer 18

determines the amount of plant growth:

warmth (temp), rainfall, and soil

Question 19

monoculture

Answer 19

growing a single crop in a large are of land.

Question 20

biological magnification

Answer 20

an increase in the amount of harmful chemical as you go up the levels in the food chain.

Question 21

why has the global human population increased dramatically in the last century?

Answer 21

drop in the death rate from improved health care, sanitation, and food production.

Question 22

What does it mean for earth to be a “closed system”?

Answer 22

no new matter enters or leaves

Question 23

organic matter

Answer 23

substances that contain the elements carbon joined to hydrogen. e.g.. sugars, fat, protein DNA

Question 24

inorganic matter

Answer 24

substances that do not contain carbon joined to hydrogen. eg. water, salts, minerals.

Question 25

biotic

Answer 25

living parts of the environment

Question 26

abiotic

Answer 26

non-living parts of the environment

Question 27

equation for photosynthesis?

Answer 27

CO2+H2O+Light(reactants)----> C6h12O6+O2(products) or carbon dioxide+water+light----> glucose+oxygen

Question 28

equation for cellular respiration?

Answer 28

O2+ C6H12O6(reactants)-----> CO2+H20+Energy(products or oxygen+glucose------> carbon dioxide+water+energy

Question 29

How does CO2 cause the temperature to increase?

Answer 29

The CO2 gets trapped in the atmosphere, making it bigger, and warming the earth.

Question 30

moulans

Answer 30

fresh mountain water tunnelling down to the ground.

Question 31

biome

Answer 31

a region of the world with a distinct climate, and unique plants and animals.

Question 32

What factors determine the climate?

Answer 32

latitude (distance from the equator), location in relation to the oceans, and local geography.

Question 33

What are the 7 major biomes?

Answer 33

tundra, coniferous forest, savanna, desert, grassland, deciduous forest, rainforest

Question 34

How is acid rain form?

Answer 34

SO2 from fossil fuels, and NO/NO2 from cars combine with water in the air and eventually return to earth.

Question 35

littoral zone

Answer 35

the area from the lakeshore to where plants rooted in the bottom of the lake can no longer be found.

Question 36

limnetic zone

Answer 36

are of the open lake where there is enough light for photosynthesis to occur.

Question 37

profundal zone

Answer 37

the region beneath the limnetic zone, where there is not enough light for photosynthesis to occur.

Question 38

describe an oligotrophic lake

Answer 38

deep and cold, low nutrient levels, and water is usually very clear.

Question 39

describe a eutrophic lake

Answer 39

shallow and warm, excellent supply of nutrients, water often murky.

Question 40

epilimnion

Answer 40

the upper level of a lake, which warms up

Question 41

hypolimnion

Answer 41

lower level, remains at a low temperature

Question 42

thermocline

Answer 42

in between, a narrow zone which the temperature drops rapidly from warm to cold.

Question 43

biodiversity

Answer 43

the number of species in an ecosystem

Question 44

evaporation

Answer 44

liquid to gas

Question 45

precipitation

Answer 45

h20 returning to the earths surface

Question 46

transpiration

Answer 46

water loss from plants

Question 47

sublimation

Answer 47

solid to gas

Question 48

condensation

Answer 48

gas to liquid (forms clouds)

Question 49

aquifer

Answer 49

stored ground water (<1%)

Question 50

carrion

Answer 50

dead animals