C2 4.5 The Carbon Cycle Flashcards
1
Q
Does carbon dioxide enter the atmosphere by respiration or photosynthesis?
A
Respiration
2
Q
Does carbon dioxide leave the atmosphere by respiration or photosynthesis?
A
Photosynthesis
3
Q
Name two processes which add carbon dioxide into the atmosphere
A
Respiration and combustion
4
Q
Name two processes which remove carbon dioxide from the atmosphere
A
Photosynthesis and dissolving in oceans
5
Q
When land-based animals, plants and soil decompose in the absence of oxygen, what is eventually formed?
A
Fossil fuels
6
Q
4 in 10,000 particles of air are carbon dioxide. What is this as a percentage?
A
0.04%
7
Q
Name six carbon stores
A
The atmosphere, oceans, sedimentary rocks, fossil fuels, plants and animals, soil
8
Q
How does carbon enter sedimentary rocks?
A
When sea shells form the rock
