carbon cycle

Question 1

stage 1

Answer 1

• carbon dioixde removed from atmosphere by green plants and algae during photosynthesis
• carbon used to make glucose, turns into carbohydrates, fats, proteins make up plants body

Question 2

stage 2

Answer 2

when plants respire, some carbon returned to atmosphere as carbon dioxide

Question 3

stage 3

Answer 3

• when plants are eaten by animals, carbon turns into fats and proteins in their body
• carbon moves through food chain

Question 4

stage 4

Answer 4

when animals respire, some carbon returned to atmosphere as carbon dioxide

Question 5

stage 5

Answer 5

• when plants and animals die, microorganisms feed on remains
• when these organisms respire carbon dioxide is returned to atmosphere

Question 6

stage 6

Answer 6

animals produce waste which is broken down by microorganisms

Question 7

stage 7

Answer 7

combustion of wood and fossil fuels releases carbon dioxide into atmosphere

Question 8

stage 8

Answer 8

carbon (and energy) constantly being cycled from air through food chain eventually back into air