carbon cycle

Question 1

what percentage of the earths atmosphere is carbon dioxide

Answer 1

0.04%

Question 2

what process removes co2 from atmosphere

Answer 2

photosynthesis

Question 3

what processes put co2 into atmosphere

Answer 3

respiration
decomposition
combustion

Question 4

why is carbon dioxide concentration greater at night than during the day

Answer 4

no light, no photosynthesis, no co2 being taken from atmosphere

low temperature so respiration occurs at a slower rate

Question 5

why have co2 levels increased recently

Answer 5

fossil fuel COMBUSTION release co2

deforestation- removes photosynthesising biomass. reduces co2 removed from atmosphere

Question 6

what can increase of co2 in the atmosphere cause

Answer 6

climate change

Question 7

what are the names of the 2 decomposers which feed on dead mammals and plants

Answer 7

saprophytes
detritivores

Question 8

what are the differences and similarities between the carbon cycle and nitrogen cycle

Answer 8

both include inorganic gases which are both in atmosphere

both elements are fixed into organic compound

animals obtain both by feeding on plants

microorganisms return both to atmosphere (denitrification, decomposition)

Question 9

how do aquatic plants use carbon dioxide

Answer 9

use it in dissolved carbonates