The smart way to improve grades

Comprehensive & curriculum aligned

Affordable pricing from £10/month

The Carbon Cycle

In this worksheet, students will learn about how carbon, as an element, is recycled through the Earth and its atmosphere.

'The Carbon Cycle' worksheet

Key stage:  KS 3

Curriculum topic:  Chemistry: Earth and Atmosphere

Curriculum subtopic:  Carbon Cycle

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

Carbon is in the Earth's atmosphere in the form of carbon dioxide.

Plants remove carbon dioxide from the atmosphere and use it in a process called photosynthesis to make their food. When plants and animals die, they decay (decompose, break down) in the soil. This process occurs by microorganisms called decomposers. This adds carbon to the soil. The decomposed bodies of plants and animals become fossil fuels after millions of years. Fossil fuels are coal, crude oil and natural gas. They are substances made from carbon and hydrogen. Fossil fuels are burned in factories, vehicles and homes (generally used by humans) to provide energy. The process of burning is called combustion and it adds carbon dioxide and carbon monoxide to the atmosphere.

Finally, plants, animals and decomposers respire. Respiration is a process that uses oxygen from the atmosphere and glucose from food, so living organisms can make the energy they need to survive. Respiration releases carbon dioxide and further adds carbon to the atmosphere.

 

Carbon Cycle

What is the main substance that contains carbon in the Earth's atmosphere?

carbon monoxide

carbon dioxide

carbon trioxide

What is the process plants do that removes carbon dioxide from the Earth's atmosphere?

What happens after animals and plants die?

They dissolve.

They absorb carbon.

They decay.

Choose two more words for 'decay'.

break off

break down

decelerate

decompose

die off

What microorganisms cause decay?

What is formed millions of years after plants and animals die?

frossil fuels

fossil fuels

fossal fuels

Is this statement true or false?

Decomposition of plant and animal bodies removes carbon from the soil.

true

false

What is the name for the process of burning that adds carbon to the atmosphere?

Plants and animals gain energy using oxygen and glucose. Type the name of the process below.

Is this statement true or false?

Through respiration carbon is removed from the atmosphere.

true

false

  • Question 1

What is the main substance that contains carbon in the Earth's atmosphere?

CORRECT ANSWER
carbon dioxide
EDDIE SAYS
Carbon is found in the Earth's atmosphere in a compound called carbon dioxide.
  • Question 2

What is the process plants do that removes carbon dioxide from the Earth's atmosphere?

CORRECT ANSWER
photosynthesis
EDDIE SAYS
Plants remove carbon dioxide in a process called photosynthesis.
  • Question 3

What happens after animals and plants die?

CORRECT ANSWER
They decay.
EDDIE SAYS
After they die, plants and animals decay.
  • Question 4

Choose two more words for 'decay'.

CORRECT ANSWER
break down
decompose
EDDIE SAYS
'Decay' means decompose or break down.
  • Question 5

What microorganisms cause decay?

CORRECT ANSWER
decomposers
EDDIE SAYS
Decomposers are microorganisms that cause decay.
  • Question 6

What is formed millions of years after plants and animals die?

CORRECT ANSWER
fossil fuels
EDDIE SAYS
Fossil fuels form millions of years after plants and animals die.
  • Question 7

Is this statement true or false?

Decomposition of plant and animal bodies removes carbon from the soil.

CORRECT ANSWER
false
EDDIE SAYS
The statement is false; decomposition of plant and animal bodies adds carbon to the soil.
  • Question 8

What is the name for the process of burning that adds carbon to the atmosphere?

CORRECT ANSWER
combustion
EDDIE SAYS
Combustion is the scientific name for burning. Combustion adds carbon to the atmosphere.
  • Question 9

Plants and animals gain energy using oxygen and glucose. Type the name of the process below.

CORRECT ANSWER
respiration
EDDIE SAYS
Plants and animals gain energy using oxygen and glucose in a process called respiration.
  • Question 10

Is this statement true or false?

Through respiration carbon is removed from the atmosphere.

CORRECT ANSWER
false
EDDIE SAYS
The statement is false; through respiration carbon is added to the atmosphere.
---- OR ----

Sign up for a £1 trial so you can track and measure your child's progress on this activity.

What is EdPlace?

We're your National Curriculum aligned online education content provider helping each child succeed in English, maths and science from year 1 to GCSE. With an EdPlace account you’ll be able to track and measure progress, helping each child achieve their best. We build confidence and attainment by personalising each child’s learning at a level that suits them.

Get started
laptop

Start your £1 trial today.
Subscribe from £10/month.