EnergyEnergy

Without energy nothing happens.Without energy nothing happens.

Energy does work!Energy does work!

Work is done when objects are moved or Work is done when objects are moved or heated.heated.Energy is never ‘used up’ it is simply Energy is never ‘used up’ it is simply convertedconverted from one form to another. Can from one form to another. Can you think of some sources of energy?you think of some sources of energy?Fuels and food are sources of energy.Fuels and food are sources of energy.Can you think of any examples when Can you think of any examples when energy is energy is convertedconverted from one form to from one form to another?another?

Converted EnergyConverted EnergyFuels for generating electricity.Fuels for generating electricity.

There are 3 main classes of fuel which can There are 3 main classes of fuel which can be used to generate electricity:be used to generate electricity:

Fossil fuels, renewable fuels and nuclear Fossil fuels, renewable fuels and nuclear fuels.fuels.

What are fossil fuels? What are fossil fuels?

What are renewable fuels?What are renewable fuels?

How are these fuels used to generate How are these fuels used to generate electricity?electricity?

Energy is released from the fuel.Energy is released from the fuel.

Fossil fuels such as gas, coal and oil and Fossil fuels such as gas, coal and oil and renewable fuels such as wood are burnt renewable fuels such as wood are burnt and heat is generated.and heat is generated.

This heat is used to boil water and the This heat is used to boil water and the steam that is created is used to turn large steam that is created is used to turn large propellers called turbines.propellers called turbines.

These turbines then turn electrical These turbines then turn electrical generators.generators.

In addition to these fuels there are other In addition to these fuels there are other energy sources used to generate energy sources used to generate electricity. electricity.

Can you think of any?Can you think of any?

Other energy sourcesOther energy sources

Solar power: converts the energy of the sun into Solar power: converts the energy of the sun into electricity.electricity.Wind power: Moving air can be used to turn Wind power: Moving air can be used to turn propellers.propellers.Hydroelectric power: using water. The higher the Hydroelectric power: using water. The higher the drop and the greater the drop, the more energy drop and the greater the drop, the more energy can be created. can be created. Wave power: wind causes waves to form on the Wave power: wind causes waves to form on the water and the motion of these waves can be water and the motion of these waves can be used to turn generators.used to turn generators.

What have we learnt?What have we learnt?Energy does work.Energy does work.Energy is never ‘used up’ it is simply converted from one Energy is never ‘used up’ it is simply converted from one form to another.form to another.Fuels and food are sources of energy.Fuels and food are sources of energy.There are 3 main classes of fuel which can be used to There are 3 main classes of fuel which can be used to generate electricity: Fossil fuels, renewable fuels and generate electricity: Fossil fuels, renewable fuels and nuclear fuels. nuclear fuels. Fossil fuels such as gas, coal and oil and renewable Fossil fuels such as gas, coal and oil and renewable fuels such as wood are burnt and heat is generated.fuels such as wood are burnt and heat is generated.This heat is used to boil water and the steam that is This heat is used to boil water and the steam that is created is used to turn large propellers called turbines.created is used to turn large propellers called turbines.These turbines then turn electrical generators.These turbines then turn electrical generators.There are other sources of energy such as: Solar power, There are other sources of energy such as: Solar power, wind power, hydroelectric power and wave power.wind power, hydroelectric power and wave power.

These photographs show ways of getting These photographs show ways of getting energy from four different energy sources, energy from four different energy sources,

can you name them?can you name them?