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6.3 Interpreting and interacting with earth systems

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Question 18
F

Biofuels are made from plants. Some people say that using biofuels instead of fossil fuels does not add any carbon dioxide to the atmosphere.

Which is the best evaluation of this claim?

[1]
A

The claim is correct, because biofuels do not release any carbon dioxide when they burn.

B

The claim is correct, because biofuels are renewable, so they cannot add carbon dioxide to the atmosphere.

C

The claim is not fully correct, because the plants absorbed carbon dioxide as they grew, but fossil fuels are often used to grow, process and transport the biofuel.

D

The claim is not correct, because burning biofuels releases more carbon dioxide than burning the same mass of fossil fuel.

Markscheme

6.3 Interpreting and interacting with earth systems Questions

  1. GCSE
  2. /Chemistry
  3. /6.3 Interpreting and interacting with earth systems

51 exam-style questions on OCR GCSE Chemistry 6.3 Interpreting and interacting with earth systems, covering 6.3.1 Formation and evolution of the atmosphere, 6.3.2 The greenhouse effect and climate change, 6.3.3 Sources and problems of atmospheric pollutants, and 6.3.4 Producing potable water. Each one has a worked solution and a mark scheme showing where the marks go.

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