BIOLOGICAL CARBON CYCLE (grades 6-8) QUESTIONS

What does the “balance of life” mean?

Plants and animals are two sides of a coin.

Plants and animals, all life on earth, fit together like a puzzle.

We all work together and need each other.



1. Why do plants need water? What do plants do with the water they drink?

2. Why do plants breathe out oxygen?

3. Where does the oxygen which plants breathe out come from? 

4. Why do animals breathe in oxygen?

5. What do animals do with the oxygen they breathe in? 

6. What does the oxygen which animals breathe in turn into?

7. Why do animals breathe out carbon dioxide?

8. Where does the carbon dioxide which animals breathe out come from?