Download Energy. - MrWoodheadsScience

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Energy lets you do things.
Another name for energy is?
Energy in measured in? Joules (J).
There are how many joules (J) in a kilojoule
(kJ)?
There are many types of energy you need to
know about.
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Much of the energy around us is stored energy.
We notice it only when it changes to other
forms.
It has the potential to do work, so it is called
potential energy.
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1. Light
2. Sound
3. Heat
4. Nuclear
5. Electrical
6. Chemical potential
7. Gravitational potential
8. Kinetic
9. Elastic potential
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Burning chemicals, very hot objects, and stars
all release light energy.
Plants use light energy from the sun for
photosynthesis.
We use light energy for?
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Sound is a form of
energy caused by
vibrating objects.
The louder a sound is,
the more energy it
has.
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Heat energy is the type of energy hot objects
have.
Taking away heat energy makes an object
cooler.
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Energy stored inside atoms can be released as
nuclear energy.
Energy released from uranium atoms is used in
nuclear power stations.
Nuclear energy stored in hydrogen atoms is the
source of the sun’s energy.
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Electrical energy is widely used because it can
be easily transmitted through wires to the place
it is needed.
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Energy can be stored in chemicals as chemical
potential energy.
Fuels such as wood or petrol and batteries store
chemical energy.
Foods also contain chemical potential energy
that can be used by our bodies.
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The energy something has when it is high up is
gravitational potential energy.
Slides, roller coasters, bungee jumping and sky
diving, all have gravitational potential energy
at the top ready to be used.
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Any moving object has kinetic energy.
As a moving object slows down it loses kinetic
energy.
Wind, moving cars and you running all have
kinetic energy.
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Stretching springs, elastic and rubber bands
stores elastic potential energy that can be
released.
Trampolines are good example of using elastic
potential energy.
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The principle of conservation of energy says
that,
1. Energy can never be created or destroyed.
2. Energy can be converted/transformed from
one form to another.
3. In an energy change the total amount of
energy stays the same.