Biology Topic Practice

Carbon & Water Cycles

All materials in the living world are recycled to provide the building blocks for future organisms.

Do you know how carbon is returned to the atmosphere?

What is Carbon & Water Cycles?

"The carbon and water cycles are the processes by which these essential materials are continuously recycled through the living and non-living parts of an ecosystem."

Question 1

What do decomposers do in an ecosystem?

Question 2

Which condition would usually speed up decomposition by microorganisms?

Question 3

Which process adds water vapour to the atmosphere from plant leaves?

The Cycles of Life

The water cycle provides fresh water for plants and animals through evaporation and precipitation.

The carbon cycle returns carbon from organisms to the atmosphere as CO2 through respiration and decay.

Exam Tip

Microorganisms (decomposers) play a vital role in recycling materials through decay.

Accelerate your revision

Master carbon & water cycles and more with our exam-focused practice app.

Try the App Free
No sign-up required to start