Carbon Cycle

Question 1

What percentage of carbon is stored in the lithosphere?

Answer 1

99.9%

Question 2

What percentage of carbon is stored in the hydrosphere?

Answer 2

0.04%

Question 3

What percentage of carbon is stored in the biosphere?

Answer 3

0.004%

Question 4

What percentage of carbon is stored in the cryosphere?

Answer 4

0.1%

Question 5

What percentage of carbon is stored in the atmosphere?

Answer 5

0.001%

Question 6

Processes driving change in the carbon cycle

Answer 6

Respiration
Photosynthesis
Diffusion
Sequestration
Decomposition
Weathering
Compaction
Combustion

Question 7

Stages of succession in the lithosphere

Answer 7

bare rock colonised by pioneer species such as lichens
Dead organic material builds up and the exposed rock is further weathered
Mosses colonise rocks and soil forms when the rock is further weathered
Decomposition of organic matter leads to carbon in the soil
Grasses grow, roots cause biological weathering
Soil respiration improves quality
Larger plants grow due to more nutrients

Question 8

Human causes of change in the carbon cycle

Answer 8

Hydrocarbon fuel extraction and burning
Farming practices
Deforestation
Land use changes

Question 9

Natural causes of change in the carbon cycle

Answer 9

Volcanic activity
Wildfires