S3 Science
Energy Topic
Forms of Energy
There are 8 main forms of energy
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o
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Heat
Light
Sound
Electrical
Potential (gravity or elastic)
Kinetic (movement)
Chemical
Nuclear
Energy Changes
Energy can be changed from one form into another.
It cannot be created or destroyed.
E.g.
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Kettle - Electrical to Heat
Balloon bursting – Potential to Sound
Burning magnesium – Chemical to Light
Sun - Nuclear to Light and Heat
Drumming – Kinetic to Sound
Heat Energy
Heat Energy travels in 3 different ways:
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Conduction
Convection
Radiation
Heat Energy - Conduction
Solid Objects
The particles vibrate beside each other passing
the energy from one particle to the next.
Heat Energy - Convection
Liquids & Gases
The hotter particles rise up.
The cooler particles move down.
A convection current is made.
The top of a room is always warmer than the bottom
because of convection (heat rises).
Heat Energy - Radiation
All hot objects (Solids, liquids & gases)
Infrared rays of energy are given out
Infrared rays can travel through a vacuum (space)
Energy Sources
Energy sources can either be renewable or
non-renewable.
Non-renewable energy sources will run out.
Renewable energy sources will not run out.
Non-renewable Energy Sources
The main non-renewable energy sources are:
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Fossil fuels (coal, oil and gas)
Nuclear fuels (uranium and plutonium)
We have to conserve
them so they last
longer before they
run out.
Renewable Energy Sources
The main renewable energy sources are:
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Wind
Waves
Hydroelectric
Solar
They are better for the environment.
Energy Sources Example
Draw lines to match the object with its source of
energy and tick, if it renewable or non-renewable.