The atmosphere

The atmosphere

Why is the atmosphere important?

• We need the atmosphere:
• So we can survive
• To protect us from the sun
• Regulates the temperature
• Oxygen
• 

Timeline of the atmosphere

• The surface of the earth was molten for millions of years.
• There was not an atmosphere as it was to hot.
• 

Folie 4

• The temperature cools and the crust was formed.
• 

Folie 5

• Volcanoes erupted (gases)
• Co2, H2O NH3 (immonia),CH4(methane).
• It was thought that this was how the early atmosphere was formed.
• 

Folie 6

• As the earth cools down, water vapor condenses, the liquid water falls as rain and creates oceans.
• 

Folie 7

• Some CO2 dissolved into oceans.
• Plants and algae evolve, take in CO2 through photosynthesis.