C13 - The Earths Atmosphere 2️⃣✅

About 95% carbon dioxide, almost no oxygen and a small amount of nitrogen.

A very small % of carbon dioxide, around 80% nitrogen, 20% oxygen and little to no water vapour

Via intense volcanic activity that released gasses like carbon dioxide that formed the early atmosphere

The little amount of water vapour In the earths early atmosphere started to condense as the earth started to cool down, ultimately making the water vapour into liquid water, forming our oceans

Because it all condensed into liquid when the earth cooled

Due to oceans forming, simple plant life came to be. This simple plant life (algae) started to absorb carbon dioxide and undergo photosynthesis, ultimately producing oxygen.

Because the early plant life was absorbing the CO2 and producing O2, shifting the amounts of gasses to predominantly O2 rather than CO2

Sedimentary rocks formed, contains fossil fuels and therefore carbon, ultimately decreasing the amount in the atmosphere

They would sink to the bottom of the ocean, therefore trapping the carbon down under the ocean, decreasing its concentration in the atmosphere

The constant maintaining of the temperature of the earth by greenhouse gasses.

Methane, Carbon dioxide and water

The sun emits short wavelength radiation which warms the earth The earth looses the heat by emitting long wavelength radiation back up into space The greenhouse gasses absorb some of the long wavelength radiation, re-radiating it back down to earth, consequently warming the earth so life can survive

Because it allows for the earth to be warm enough to support life

When humans are increasing the concentration of greenhouse gasses in the atmosphere, therefore increasing the amount of heat re-radiated back at earth, warming it beyond its optimal level

By cutting down trees reduces the ammount od CO2 absorbed from the atmosphere by photosynthesis

Cattle produce methan, a greenhouse gas. By humans farming cattle excessively, too much methane is released into the atmosphere, therefore adding to global warming

The anerobic decay of waste in ladfill by microoganisms produces methane which contributes to global warming

• Ice caps melting, therefore loss of habitat • Sea levels rising, loss of animal and human habitats

Extreme weather events are more common and severe e.g. flooding, storms

• Lack of rain causes drought & famine • Too much rain can damage crops

As climate change is happening so rapidly, animals and plants cannot adapt to the new environment quick enough, so die out

The total ammount of carbon dioxide and other greenhouse gasses emitted over the full life cycle of a product, service, event, company or person

Complete combustion of hydrocarbon fuels

Global warming