the carbon (dioxide) cycle

Question 1

carbon and nitrogen are both r…… in the ecosystem in a cycle

Answer 1

recycled

Question 2

there’s a f….. amount of carbon in the world

Answer 2

fixed

Question 3

in the carbon cycle, there’s only one way it comes from the air. What is this process called?

Answer 3

photosynthesis

Question 4

in the carbon cycle, what product is the cycle moving around
(HINT: it’s not C)

Answer 4

C02

Question 5

plants use the carbon from CO2 to make….

Answer 5

lipids, carbohydrates and proteins

Question 6

it goes back in to the atmosphere by:

Answer 6

• animal respiration
• plant respiration
• burning products made from plants and animals
• burning fossil fuels (decomposed plants and animals)
  WHY?
  they have eaten carbon compounds which go back into the soil