Carbon cycle

Question 1

carbon fix

Answer 1

carbon that is stored by photosynthesis , in plant bodies/soil until bodies decompose and release to atmosphere

Question 2

sink

Answer 2

a store of carbon that removes from atmosphere (peat bogs)

Question 3

source

Answer 3

source of carbon, fossil fuels

Question 4

soil and carbon

Answer 4

contains lots of carbon, if exposed to oxygen can release it

Question 5

how else is carbon released

Answer 5

respiration

Question 6

oceans and carbon

Answer 6

source/sink, absorbs co2 as carbonic acid (acidity increases as more carbonic acid), as temp increases it becomes less efficient absorbing carbon, oceans release less co2 than absorb as photosynthesis

Question 7

impacts of increased acidity

Answer 7

corrosive to calcium carbonate shells, coral bleaching, less coral reefs built, fish impacted as less mussels for food

Question 8

carbon fixes in ocean

Answer 8

organisms grab co2 then algae perish and sink and stored which creates off balance and causes atmosphere to store more carbon

Question 9

geological

Answer 9

chemical weathering of silicate rocks/carbonate rocks draws co2 from atmosphere, weathering makes bicarbonate ions which move to ocean and are taken up by organisms (equilibrium)

Question 10

plants

Answer 10

fractionate (prefer) c12 carbon isotopes, more likely to use c12 than c13 meaning more c12 is in atmosphere as fossil fuels are being burnt

Question 11

impacts from humans

Answer 11

100 times worse than natural as deforestation/fossil fuels

Question 12

how to fix it

Answer 12

stop burning fossil fuels, or accelerate co2 storage