AQA Chemistry Earth's Atmosphere

Which gas in our atmosphere is most abundant?

• Argon
• Oxygen
• Nitrogen
• Carbon Dioxide

What percentage of our atmosphere is made up of other gases such as argon, water vapor, and carbon dioxide?

• 1%
• 21%
• 78%
• 17%

Oxygen makes up approximately ____% of the gases in the atmosphere.

• 20
• 40
• 60
• 80

Within the stratosphere is the ozone layer. What does the ozone layer do?

• It protects us from meteors
• It protects us from violent solar flares
• It protects us from ultra violet radiation
• It helps us breathe
  

This is the source of all heat energy in our atmosphere

• Moon

• Sun

• Water

What caused Earth's early atmosphere?

• It was always there

• Carbon dioxide and ammonia

• Volcanoes

• Brought in by an asteroid

Which of these was not a trace gas in Earth's early atmosphere?

• Methane

• Nitrogen dioxide

• Ammonia

• Sulfuric acid

Which of these planets' atmosphere closely resembles Earth's early atmosphere?

• Venus

• Mercury

• Jupiter

• Uranus

What is the process that early organisms used to convert carbon dioxide?

• Respiration

• Photosynthesis

• Saponification

• Hybridisation

Where were the first photosynthesizing bacteria found?

• Rocks

• Stromatolites

• Icebergs

• In caves