Exercises: The stages of the carbon cycle

Name the process by which plants capture CO₂ from the atmosphere and the process by which plants and animals return CO₂ to the atmosphere. Briefly explain what happens in each one.

Look at the carbon cycle diagram. Identify which process each of the numbered arrows (1 to 4) represents, choosing from: photosynthesis, feeding, decomposition, and respiration.

Decomposer bacteria and fungi act on the remains of dead plants and animals. Explain what role they play in the carbon cycle and what would happen to the carbon in dead matter if they did not exist.