The earth's early atmosphere (Contained (Little (Nitrogen, methane,…
The earth's early atmosphere
Gases in the early atmosphere are thought to have come from
The change in the atmosphere
The earth's temperature decreased and the water vapour cooled and condensed to form oceans.
Carbon dioxide decreased as it dissolved in oceans.
Levels of oxygen increased as the rate of photosynthesis increased which also reduced amounts of Carbon dioxide
Chemical test for oxygen
If a glowing splint relights
When fossil fuels burn, they release CO2, helping the greenhouse effect.
Methane is released as well as CO2 when burning fossil fuels but is also released when cattle ranching.
Energy transferred from the sun on to the earth's surface
Some energy is reflected into space
Most of the energy is absorbed, increasing the earth's temperature
The earth emits energy
Some emitted energy is transferred into space
However, some energy is absorbed by greenhouse gases and transferred back to earth.
Crops are able to grow in places they couldn't before
Animals (birds) change to migration
Loss of sea ice
Increasing sea levels