Energy Transfer

Fuel formed from the fossilised remains of plants and animals over a long period of time.

Wind turbines, solar panels e.t.c Usually powered by the nuclear store of the sun

Fossil fuels like coal, oil and gas.

Conduction only occurs in solids because particles are closer together Metals are good conductors

Free electrons in metal gain heat making them faster and causing them to collide with other atoms and electrons. This makes them vibrate causing heat to be passed through quicker

In liquids and gases

1) particles gain energy and rise, becoming less dense. They become further apart and vibrate quicker 2) particles lose energy and become closer together and more dense causing them to sink

All objects can absorb or emit radiation

Passes heat on as an electromagnetic wave called an infa- red radiation It can travel through a vacum- that is how the heat from the sun reaches us

• produces a lot of electricity • reliable • can be concentrated • can be used wherever they are needed

• they will eventually run out • cause global warming • take millions of years to replace • create C02 when burnt

1) fossil fuels are burned heating water in the boiler producing steam 2) steam turns the turbine causing it to spin and turn the generator 3) generator produces electrical current which is transported via pylons to our homes 4) excess steam is cooled in cooling towers and the water is deposited back in the boiler

Power (w) x time (s) = energy (j)

Force (n) x distance (m) = work done (j)

Kinetic- running Elastic- stretching a hair band Chemical- battery Gravitational potential- going up in a lift Thermal- heating your dinner

Electric Force Sound Light Heating- conduction, convection and radiation