The Evolution of Earth's Atmosphere

___________ were responsible for releasing the first gases into the atmosphere

The most abundant gas in the early atmosphere was

• water vapour

• carbon dioxide

• ammonia

• nitrogen

What is the correct composition of the modern atmosphere?

Which planet was our atmosphere closest to at the beginning?

• Mercury

• Venus

• Jupiter

• Saturn

When the Earth cooled the water vapour ___________

What were the first forms of life to photosynthesise?

• 
• 
• 
• 

Carbon dioxide ___________ into the oceans

Oxygen was produced from

carbon containing compounds called ____________ precipitated in the oceans and formed the shells of animals