The global carbon cycle

Compare the sizes of Earth's carbon stores and fluxes in gigatonnes and explain how human activity has shifted the balance.

⏱ 19 min❓ 9 questions

What you'll be able to do

✔I can compare the sizes of global carbon stores and the rates of carbon fluxes
✔I can convert between masses of carbon dioxide and carbon and relate emissions to atmospheric concentration
✔I can explain why a small human flux has a large effect on a balanced natural cycle

How this works

1Read the short explanations first — they teach you what you need before each question.
2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.

What's inside

9 questions and 1 quick teaching card, including:

↕️Put in order — Use the up and down arrows to sort the steps.
🔢Number answer — Work out the answer and type the number.

👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.

Curriculum: AC9S10U04