The carbon cycle

Question 1

Why do materials decay

Answer 1

Because they are broken down by microorganisms

Question 2

What conditions increase the rate of decay

Answer 2

-warm climate
-moist climate
-aerobic conditions

Question 3

The carbon cycle

-C… is removed from the a… by p… and algae during p…, where it is used to make g… which can be turned into things that make up the b… of the plant
-when the … and algae r…, some c… is returned to the a…
-when the a…, plants and algae d… they are e… by other animals and m…, which then r… releasing C…
-animals produce w… that is broken down by d… feeders and m…
-the c… of … releases …
-so the c… is being constantly c…

Answer 3

• CO2 is removed from the atmosphere by plants and algae during photosynthesis, where it is used to make glucose which can be turned into things that make up the bodies of the plant
  -when the plants and algae respire, some carbon is returned to the atmosphere
  -when the animals, plants and algae die they are eaten by other animals and microorganisms, which then respire releasing CO2
  -animals produce waste that is broken down by detritus feeders and microorganisms
  -the combustion of fuel releases CO2
  -so the carbon is being constantly cycled