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Flashcards in Science - Bio Deck (50):
1

sustain

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

2

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

human impact

3

ecosystem

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

4

detritus

waste from plants and animals, including their dead remains.

5

decomposers

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

6

trophic level

energy level

7

autotroph

self producer of energy

8

heterotroph

a consumer of energy.

9

Why are pyramids used to represent three things in Biology?

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

10

Pyramid of Numbers

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

11

Pyramid of Energy

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

12

What is the 10% Law of Energy Transfer

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

13

Pyramid of Biomass

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

14

population

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

15

carrying capacity

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

16

Limiting factors that determine the carrying capacity?

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

17

productivity

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

18

climate

determines the amount of plant growth:
warmth (temp), rainfall, and soil

19

monoculture

growing a single crop in a large are of land.

20

biological magnification

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

21

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

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

22

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

no new matter enters or leaves

23

organic matter

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

24

inorganic matter

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

25

biotic

living parts of the environment

26

abiotic

non-living parts of the environment

27

equation for photosynthesis?

CO2+H2O+Light(reactants)----> C6h12O6+O2(products)

or

carbon dioxide+water+light---->
glucose+oxygen

28

equation for cellular respiration?

O2+ C6H12O6(reactants)----->
CO2+H20+Energy(products

or

oxygen+glucose------>
carbon dioxide+water+energy

29

How does CO2 cause the temperature to increase?

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

30

moulans

fresh mountain water tunnelling down to the ground.

31

biome

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

32

What factors determine the climate?

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

33

What are the 7 major biomes?

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

34

How is acid rain form?

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

35

littoral zone

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

36

limnetic zone

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

37

profundal zone

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

38

describe an oligotrophic lake

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

39

describe a eutrophic lake

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

40

epilimnion

the upper level of a lake, which warms up

41

hypolimnion

lower level, remains at a low temperature

42

thermocline

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

43

biodiversity

the number of species in an ecosystem

44

evaporation

liquid to gas

45

precipitation

h20 returning to the earths surface

46

transpiration

water loss from plants

47

sublimation

solid to gas

48

condensation

gas to liquid (forms clouds)

49

aquifer

stored ground water (<1%)

50

carrion

dead animals