1. Energy Sources

2. What is a fuel? concentrated chemical store of energy
energy is usually released by combustion (reaction involving oxygen)
exception is “nuclear fuel” which is energy stored in the nucleus of an atom – the energy is released when nuclei are joined (fusion) or split (fission)

3. Examples of fuels

4. Original energy source
The Sun is the original source for a lot of our energy sources

5. The Sun as energy origin
Sun > heats air > air convects > wind
Sun > plants > buried > heat/pressure/time > coal
exceptions
Moon > tides > tidal
radioactive decay > geothermal
Nuclear fission/fusion > nuclear

6. What is energy?
forms – thermal, kinetic, light, sound, chemical, nuclear, strain, gravitational
energy transfers make things happen
e.g. candle burning
chemical -> light/thermal

7. What is the difference in fuel consumption between developed and developing countries?

8. Energy Sources
renewable and non-renewable