Skip to content

Course home

Question bank·9.1 The composition and evolution of the Earth's atmosphere
Sign up

9.1 The composition and evolution of the Earth's atmosphere

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435363738
Question 28

Plants were placed in a sealed transparent growth chamber and kept in the light for 8 hours.

The table shows gas-analyser readings from the chamber.

Time in hoursCarbon dioxide in the air in %Oxygen in the air in %
00.16020.800
80.03220.928
a.

Calculate how many times greater the percentage of carbon dioxide was at the start than after 8 hours.

[1]
b.

Use the data and the balanced symbol equation for photosynthesis to explain the changes in the percentages of both gases.

[3]
Markscheme

9.1 The composition and evolution of the Earth's atmosphere Questions

  1. GCSE
  2. /Chemistry
  3. /9.1 The composition and evolution of the Earth's atmosphere

79 exam-style questions on AQA GCSE Chemistry 9.1 The composition and evolution of the Earth's atmosphere, covering 9.1.1 The proportions of different gases in the atmosphere, 9.1.2 The Earth's early atmosphere, 9.1.3 How oxygen increased, and 9.1.4 How carbon dioxide decreased. Each one has a worked solution and a mark scheme showing where the marks go.

More questions