Energy is the ability to do work. When we move something by pushing
or pulling, we are doing work.
Energy is measured in joules (J). The work done, or energy used,
during a certain time is called power.
Power is measured in watts (W). A watt is the use of one joule of
energy for one second.
A watt is a small amount of energy so we measure power in units of
1000 watts for one hour - kilowatts for one hour.
Energy cannot be made or destroyed, but it can change from one form
Energy takes various forms, such as; potential energy, (stored
energy), kinetic energy, (movement energy), thermal, chemical,
magnetic, electrical. etc
Sources of Energy:
Energy resources can be described as renewable and non-renewable.
Renewable energy sources are those which are continually being
replaced such as energy from the sun (solar) and wind.
If an energy resource is being used faster than it can be replaced
(for example, coal takes millions of years to form) then it will
eventually run out.
This is called a non-renewable energy source.
Renewable energies: Solar Energy,
Geothermal Energy, Wind Energy, Non-Renewable Energies: Fossil Fuels, Nuclear
Energy, Biomass Energy