logo

Learning objective

Explain the carbon cycle, focusing on processes such as photosynthesis, respiration, feeding, decomposition, the creation of fossil fuels, and combustion.

Read the explanation, check the common trap, then practise with flashcards and questions.

Practise this topicRead the exam answerTopic hub

Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE BiologyOrganisms and their environmentCore content

Study support

Understand this objective

Quick explanation

Explain the carbon cycle, focusing on processes such as photosynthesis, respiration, feeding, decomposition, the creation of fossil fuels, and combustion

  • This point belongs to Nutrient cycles, especially Nutrient cycles outcomes.
  • You need to be able to explain the carbon cycle, focusing on processes such as photosynthesis, respiration, feeding, decomposition, the creation of fossil fuels, and combustion.
  • The key ideas to know are Describe.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Describe

Why it matters

This objective helps connect Nutrient cycles outcomes to exam-style questions, flashcards, and revision notes for Nutrient cycles.

Revision tools

Choose how to practise

Back to topic hub
Flashcards10 linked cards

Flashcard 1 of 10

Press Space to flip, arrows to move
Practice Questions7 linked questions

Question 1 of 7

Choose an answer, get feedback, then move sideways through the set.

0 of 5 attempted

Paper 3 structured question: Nutrient cycles

Paper 3Theory (Core)2 marks

Diagram Description

Simplified Carbon Cycle

The diagram shows carbon moving between the atmosphere, plants, animals, soil, and fossil fuels through processes such as photosynthesis, respiration, feeding, decomposition, fossil fuel formation, and combustion.

ProcessDescription
PhotosynthesisPlants take in carbon dioxide from the atmosphere.
RespirationPlants and animals release carbon dioxide into the atmosphere.
FeedingAnimals obtain carbon by eating plants.
DecompositionDead organisms are broken down, returning carbon to soil and air.
Fossil fuel formationDead organisms form fossil fuels over millions of years.
CombustionBurning fossil fuels releases carbon dioxide.
  1. a

    Describe Describe the role of photosynthesis in the carbon cycle.

    Aim for approximately 2 distinct marking points.

    [2]
Revision notestopic notes

Open the full topic revision notes when you are ready to review this objective in context.

Open revision notes

Related learning objectives

Revision hubs

Move back to a broader study route

Cambridge IGCSEBiology resources