The earths atmosphere

The earths atmosphere

What is the earth’s atmosphere like now??]

↳ Nitrogen- 78%

↳ Oxygen- 21%

↳ Carbon dioxide- 0.04%

↳ Others- 1%

How was the earths early atmosphere?

↳ Evidence is limited as it was 4.6 billion years ago

↳ Believed to be like mars or venus today with lots of carbon dioxide

Why did nitrogen increase?

↳ Volcanic activity

Why did water vapour decrease?

↳ Condensed into oceans

Why did oxygen increase?

↳ Algae photosynthesizing

↳ Over the next billion years plants evolved and oxygen increased to a level that enabled animals to evolve

Why did carbon dioxide decrease?

↳ Algae photosynthesizing

↳ Dissolved into oceans

↳ Formed sedementary rocks

What is human activity doing to the earths atmosphere?

↳ Increase amounts of green house gases in the atmosphere

↳ Burning fossiln fuels

↳ Incresing amounts of farm animals increses methane (cows farting)

What will increased human activity do to the atmoshere?

↳ Global warming (temperature of atmosphere increases)

↳ Climate change

↳ Sea levels rising

↳ Extreme weather

What is carbon monoxide

↳ Toxic gas that kills

What does sulfur dioxide cause?

↳ Acid rain

↳ What does oxides of nitrogen cause?

↳ Respiratory problems

What does particulates (solid particles) cause?

↳ Global dimming (sunlihght gets dimmer)