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Biology > Natural Cycles > Flashcards

Natural Cycles Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

About 95% of living bodies are made from

A

4 elements

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2
Q

The 4 elements are

A

Hydrogen

Oxygen

Carbon

Nitrogen

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3
Q

The 4 elements constantly cycle through the

A

Biosphere

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4
Q

Carbon and nitrogen cycles are driven by

A

Biological action

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5
Q

About _ percent of a living organism is made from

A

Carbon

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6
Q

Carbon only makes up _ percent of natural non-living material

A

0.2

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7
Q

Life takes carbon from environment primarily by _ and concentrates it in bodies

A

Photosynthesis

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8
Q

Carbon is released from living bodies during

A

Respiration

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9
Q

Carbon is released from living bodies when they

A

Die

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10
Q

After released by bodies, carbon returns to natural

A

Carbon sinks

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11
Q

Carbon sinks include (a,r)

A

Atmosphere

Rock

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12
Q

Carbon sinks include deposits of (2)

A

Oil

Gas

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13
Q

CO2 makes up only _ percent of atmosphere

A

0.04

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14
Q

Dead matter buried in low oxygen environments does not

A

Fully composed

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15
Q

Due to not fully composing, carbon

A

Stays in ground

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16
Q

Over millions of years, once living material becomes (2)

A

Solid coal

Liquid petroleum

17
Q

Over millions of years, once living material becomes natural gas such as

A

Methane

18
Q

When organic matter, including fossil fuel, is burned, it releases (3)

A

Heat

Ash

CO2 gas

19
Q

_ released into atmosphere when we use fossil fuels

A

Carbon

20
Q

Almost all living things produce CO2 as a waste product of

A

Respiration

21
Q

Respiration is the biochemical process that releases energy from

A

Food

22
Q

Carbon in remains of dead organisms is released by

A

Bacteria

23
Q

Carbon also released by other _ that consumer dead organisms

A

Decomposers

24
Q

Plants use energy from sunlight to lock CO2 into

A

Bigger, more complex molecules

25
Q

Molecules like

A

Sugars

26
Q

_ lock co2 into sugars on ocean surface

A

Single-celled algae

Biology (29 decks)

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