eNERGYEnergy

What is energy?

Energy is the ability to move something

It is measured in JoulesThe symbol for Joules is J

Heat energy – when heat causes things to move

Heat causes the liquid inside a thermometer to move.

Heat causes the liquid particles to move around quicker!

Light energy – when light causes things to move!

Light makes plants to grow!The vanes inside Crookes radiometer move because of light

Sound energy – when sound makes things move!

Sound makes our ear drums vibrate!

It makes glasses smash!

It can even cause avalanches!

Magnetic energy – when magnets make things move

A magnet can move thing towards it - like nails! A crane moves cars using

magnets!

Kinetic energy - the energy that moving things have!

Wind causes sails to move Aeroplanes can move people and luggage

A rock fall can move cars, people etc

Potential energy – the energy something has because of it’s

shape or positionA spring

A wind up clock

A jack in the box

The water in a dam

A sling shot

Chemical energy – stored in materials in their chemical bonds

Chemical energy is stored in food – animals get this energy when they break down food in their bodies!

Chemical energy – stored in materials in their chemical bonds

A battery stores chemical energyFuels like gas, turf and coal all store chemical energy that is released when they are burned!

Electrical energy - comes from moving charges

Nuclear energy – the energy that comes from nuclear fission and

nuclear fusion

Nuclear fusion in the sun

Check your learning..

• What is energy?• What unit is energy measured in?

Can you think of examples of each type of energy?

There are many different types of energy:

Heat lightsoundkineticelectricalchemicalnuclear

Different types of energy

Which type of energy?

Newton's Law of conservation of energy:Energy cannot be created or destroyed But it can be changed from one form to another.

Chemical energy in food is converted to heat energy and kinetic energy by our bodies.

Energy transfer

What other energy transfers can you think of?

Potential energy in a ball is converted to kinetic energy when it falls to the ground.

bunsen burner portable torch microphone battery radio television car

chemical to heat and lightchemical to heat and lightsound to electricalChemical to electrical to sound and heatelectrical to sound and light and heatchemical to kinetic and sound and heat

In all these transfers the energy is not lost, it is conserved. Energy cannot be destroyed or created.

What energy changes takes place in each device?

What is the energy transfer?

What energy conversions happen?

What energy conversions happen?

What energy conversions happen?

Fossils fuels are non renewable sources of energy

Non-renewable sources of energy will eventually run out and take a very long time to be made again.

Fossil fuels

Coal formation

Oil and gas formation

Ireland has a energy problem..

• 90% of electricity we use comes from burning fossil fuels…

The disadvantages of fossil fuels:1)They are non renewable (and running out!)

2) When fossil fuels are burnt they release carbon dioxide into the air which causes global warming!

Renewable sources of energy

Biomass energy

Wave and tidal energy

Wind energy

Geothermal energy

Solar energy

Renewable energy resources will not run out because they can easily be made

Renewable or non-renewable?

• Nuclear energy is made from uranium (at the moment) which will eventually run out!

Advantages/ Disadvantages of Nuclear energy

Advantages• It releases great amounts of energy. • No greenhouse gases are released by nuclear power

plants.

Disadvantages• Releases radioactive waste which can be dangerous

to the environment if not disposed of properly.• If a nuclear accident happened it would cause a lot

of environmental damage.

Group work

• Make lists of the advantages and disadvantages of each energy source

•Evaluate the other sources of energy we could use in Ireland to make electricity

Fossil fuels

Electricity

WIND WAVES

SOLAR PANELS PLANTS ANIMALS

PLASTICSGASPETROL

TURBINES TURBINES

THE SUN

The sun is our primary source of energy!

The energy that comes from the sun is changed into lots of different types of energy that we can use!

Conserving energy

Insulate with fibreglass

Double glaze and use thick curtains

Use draught excluders

Use thick carpets

Fit walls with air cavities

Energy Conservation (Saving energy)

Anagrams

Multiple-choice quiz