Earth Science
Texte du Storyboard
- Hmm. Of course I do!
- Do you want to hear a prediction?
- Millions of years ago the remains ofprehistoric plants and animals are buriedbeneath the Earth’s surface.
- These remains were covered by mud. The mud sediment was buried by more sediments, and it started to change into rock as the temperature and pressure increase.
- In that case fossil fuels are formed in a low oxygen environment. The plant and animal remains were altered chemically by this process, and slowly changed into crude oil and natural gas.
- and gases
- Through the spaces of permeable rock, the oils move upwards and will be trapped if it reached impermeable rock. In the future, Oil companies can drill down through the impermeable rocks to get it out.
- They are then able to turn it into products we can use, such as petrol and diesel.
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