Earth and Atmosphere

Question 1

The Earth’s early atmosphere is thought

to have been formed by…

Answer 1

Gas and Volcanoes

Question 2

State one human activity that increases
the amount of carbon dioxide in the
atmosphere today.

Answer 2

Burning fossil fuels

Question 3

Describe the test to show that a gas is

carbon dioxide.

Answer 3

Limewater turns cloudy/milky

Question 4

Carbon dioxide and other gases in the
atmosphere help to keep the Earth
warm. State how.

Answer 4

They trap heat

Question 5

Explain how the growth of plants affected
the percentage of oxygen in the Earth’s
atmosphere.

Answer 5

Photosynthesis occurred, so more oxygen is produced

Question 6

The percentage of oxygen in dry air is

Answer 6

21%

Question 7

Describe the test to show that a gas is

oxygen.

Answer 7

Relights a glowing splint

Question 8

Name two greenhouse gases.

Answer 8

Methane and Carbon Dioxide

Question 9

State a way the UK government is trying to

reduce carbon dioxide emissions.

Answer 9

Use more renewable energy

Question 10

The percentage of carbon dioxide in the

Earth’s atmosphere today is

Answer 10

Less than 0.5%