Carbon & Nitrogen Cycles

Question 0

Feeding process in carbon cycle

Answer 0

Passes carbon atoms from organic compounds along food chains

Question 1

What does photosynthesis do in the carbon cycle

Answer 1

Fixes carbon atoms from carbon dioxide into organic compounds (eg. Glucose)

Question 2

Respiration process in carbon cycle

Answer 2

Produces inorganic carbon dioxide from organic compounds as these are broken down to release energy

Question 3

What releases carbon from dead organic material during respiration?

Answer 3

Decomposers

Question 4

What is formed when dead organic matter does not fully decay due to conditions in the soil?

Answer 4

Fossil fuels (through fossilisation)

Question 5

Process by which plants get some of their nitrogen by absorption of nitrate ions via their roots

Answer 5

Assimilation

Question 6

What is ammonification

Answer 6

Decomposition by decomposers of dead plant and animal material produces ammonia from organic compounds

Question 7

What bacteria where is used in nitrogen fixation 2

Answer 7

Free-living nitrogen-fixing bacteria in soil

Symbiotic bacteria in root nodules

Question 8

What happens in nitrogen fixation

Answer 8

Nitrogen from the air is fixed into ammonia which is then used by the bacteria or the symbiotic plant to make amino acids and proteins

Question 9

What happens in denitrification

Answer 9

Denitrifying bacteria use nitrate in the soil and convert it back into nitrogen gas

Question 10

2 human activities that have significant effects on the global cycling of carbon

Answer 10

Combustion of fossil fuels, which increases carbon dioxide levels
Deforestation also increases carbon dioxide levels

Question 11

Why might there be faster decomposition of insects are allowed access to the dead bodies

Answer 11

Insects chew bodies into smaller pieces, providing a larger surface area for enzymes produced by decomposers