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biology > carbon and nitrogen cycle > Flashcards

carbon and nitrogen cycle Flashcards

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1
Q

what is respiration

A

a process that adds carbon to the atmosphere which animals and plants carryout

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2
Q

respiration word equation

A

oxygen + glucose -> carbon dioxide + water

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3
Q

respiration symbol equation

A

6O2 + C6H12O6 -> 6CO2 + 6H2O

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4
Q

what is combustion

A

a chemical reaction, also known as burning that releases carbon dioxide into the atmosphere

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5
Q

combustion word equation

A

fuel + oxygen -> carbon dioxide + water

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6
Q

what is photosynthesis

A

a process that removes carbon from the atmosphere which plants and algae carry out

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7
Q

photosynthesis word equation

A

carbon dioxide + water -> oxygen + glucose

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8
Q

photosynthesis symbol equation

A

6CO2 + 6H2O -> 6O2 + C6H12O6

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9
Q

what is feeding

A

how carbon is passed from plants to animals.

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10
Q

what are fossil fuels

A

a store of carbon formed when dead plants and animals get buried for millions of years

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11
Q

what is the atmosphere

A

a store of carbon that is added to when fuels are burned or living things carry out respiration

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12
Q

what are plants + algae

A

a store of carbon that is added to when photosynthesis takes place

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13
Q

what is decomposition (carbon cycle)

A

when complex, carbon compounds in dead organisms, urea and faeces are broken down into simpler carbon compounds by bacteria or fungi

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14
Q

what is feeding and assimilation

A

pass nitrogen atoms already in organic compounds

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15
Q

what is decomposition (nitrogen cycle)

A

produces ammonia from the nitrogen in compounds like proteins, DNA and vitamins

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16
Q

what is nitrogen-fixation

A

ammonia being oxidised into nitrite, then to nitrate by nitrifying bacteria

17
Q

what do plant roots absorb?

A

nitrates

18
Q

what is the role of nitrogen-fixing bacteria

A

converts nitrogen gas from the atmosphere into ammonia

19
Q

what is the role of nitrifying bacteria

A

converts ammonia into nitrites or nitrates or nitrites into nitrates

20
Q

what is the role of denitrifying bacteria

A

converts nitrogen compounds (nitrites + nitrates) into nitrogen gas

21
Q

decomposition:

A

process by which bacteria and fungi break down dead organisms into simple compounds

biology (23 decks)

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