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earth and environmental > unit 6 > Flashcards

unit 6 Flashcards

1
Q

ecology

A

study of relationships between organisms and their environment

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2
Q

habitat

A

where you live

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3
Q

niche

A

role in the ecosystem

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4
Q

biosphere

A

all the parts of earth where living things exist

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5
Q

biomes

A

all ecosystems of similar climate

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6
Q

ecosystem

A

all biotic and abiotic

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7
Q

biotic factors

A

living things

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8
Q

abiotic factors

A

non-living things

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9
Q

community

A

all the different populations in an area (trees, sheep, grasses, insects)

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10
Q

populations

A

all of one species in one area

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11
Q

organism

A

one individual

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12
Q

food chain

A

shows energy flow through an ecosystem

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13
Q

food web

A

more complex, shows many possible food chains together

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14
Q

producers

A

make their own food

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15
Q

consumers

A

get energy by eating other organisms

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16
Q

autotrophs

A

producers

17
Q

heterotrophs

A

consumers

18
Q

herbivores

A

only eat plants

19
Q

carnivores

A

eat only meat

20
Q

omnivores

A

eat plants and animals

21
Q

scavengers

A

eat already dead organisms

22
Q

decomposers

A

break down dead organic material

23
Q

what limits the number of organisms in each trophic level?

A

energy

24
Q

how much energy is lost at each level?

A

90%

25
Q

photosynthesis

A

autotrophs use co2 and suns energy to make food for growth and energy

26
Q

cellular respiration

A

consumers eat food and release co2

27
Q

fossil fuels

A

coal, oil, gas (made from organic material) release co2 when burned

28
Q

density dependent factors

A

things that happen because of an ecosystems size

29
Q

density independent factors

A

things that happen regardless of an ecosystem’s size

30
Q

examples of density-dependent factors

A

-predation
-disease
-parasitism

31
Q

examples of density-independent factors

A

-deforestation
-natural disasters
-severe frost

32
Q

what are the 6 main biomes?

A

taiga, grasslands, tundra, deciduous forest, tropical rain forest, desert

33
Q

taiga

A

a cool forest of conifers in the upper northern hemisphere

34
Q

deciduous forest

A

a forest biome with many kinds of trees tat lose their leaves each autumn

35
Q

tropical rain forest

A

a hot, humid biome near the equator with much rainfall and a wide variety of life

36
Q

desert

A

a sandy or rocky biome with little precipitation and little plant life

37
Q

tundra

A

a cold biome of the fr north, the ground is frozen even in summer

38
Q

grasslands

A

a biome where grasses, not trees, are the main plant life

39
Q

what is biodiversity

A

variety of species on earth

earth and environmental (9 decks)

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