8 De-1
Decomposers and
carbon
Name ghadeer hussain al-khayat Class 9gg Date 25-9-2020
23592 An ecosystem is made up of a community and physical environmental factors.
a What is a community? Tick (✔) the best description.
⬜ all the animals living in an area ⬜ all the plants living in an area
✓ all the organisms living in an area ⬜ all the microorganisms living in an area
Which of these is an example of a physical environmental factor? Tick (✔) one.
✓ light ⬜ microorganisms ⬜ animals ⬜ global warming
23593 Complete this sentence: Decomposers can be bacteria, fungi or
11720 Number the sentences to show the order of what happens when bacteria feed.
2 Large organic molecules are broken down.
3 Small organic molecules are absorbed.
1. Enzymes are released.
11721 Which of these are organic molecules? Tick (✔) two.
✓ glucose ⬜ soil ⬜ oxygen ⬜ water ✓ proteins ⬜ light
11722 Give two reasons why decomposers are important.
so they decompose dead things
11723 The diagram shows a simple carbon cycle.
What processes are happening at numbers 1–5?
1 decay
2 respiration
3 feeding
4 photosynthesis
5 burning or combustion
© Pearson Education Ltd 2014. Copying permitted for
purchasing institution only. This material is not copyright free. 38
8 De-1
Decomposers and
carbon
I can…
● explain the importance of decomposers
● model the recycling of carbon in an ecosystem using the carbon cycle.
© Pearson Education Ltd 2014. Copying permitted for
purchasing institution only. This material is not copyright free. 39
