- Created by: ä
- Created on: 13-02-19 10:36
- Fossil fuels are formed from the fossilised remains of plants and animals over millions of years
- Coal, oil and gas are extracted through mining and drilling
- Fossil fuels are considered a finite resource as they take a few million years to form, and humans are using them significantly faster than the environment can replace.
- They are relied upon for power generation because they are effective and they are a cheap source of energy
- Extraction of fossil fuels can disrupt the environment, especially open cast mining.
- Fossil fuels can be burned to superheat water under pressure, which in turn, drives turbines
- Chemical energy from fuel is turned into heat, in the form of superheated steam
- The steam drives turbines, converting heat to kinetic energy
- Kinetic energy drives the shaft which spins an electricity generator, converting kinetic energy to electricity
- The electrical energy is transferred to the National Grid by pylons, where it is used.
- Fracking involves drilling into layers of shale rock deep in the earth to release pockets of gas
- Water, sand and chemicals are injected into a well in order to force gas up
- The water pressure creates fissures in the rock which open up areas with gas
- Sand stops the fissures from closing up, and allow the gas to flow into the well pipe
- Chemicals can contaminate nearby water tables used for drinking…