Forms, Uses and Sources of Energy
Energy
Means " the ability to do work"
Examples
Potential energy
Gravitational potential energy
Present in anything that
is ABOVE GROUND
Chemical potential energy
Present in all objects
Elastic potential energy
Present in stretched or
compressed elastic objects
Stretched rubber band
Compressed spring
Kinetic energy
A form of energy that
is present in ALL
moving objects
Affected by:
Mass of an object
Speed of an object
Electrical energy
A form of energy that
is widely used and can
be converted to other forms
Sound energy
A form of energy that
allows us to hear
Produced when
something vibrates
Needs a medium to move through
Heat energy
A from of energy that
makes objects hot or
cold
Sources of heat
Sun
Heater
Fire
Light bulb
Electric kettle
Light energy
A form of energy that
allows us to see
Uses
Seeing
Photosynthesis
Producing electricity
Conversion of energy
Energy cannot be created nor
destroyed. It can only be
converted from one form to
another
Examples
Producing electricity
Hydroelectric dam
Gravitational potential energy( of water in dam)
Kinetic energy(of water)
Kinetic energy(of turbine)
Electrical energy (of generator)
Power plant
Chemical potential energy
Heat energy
Kinetic energy
Electrical energy
Solar cells
Light energy
Electrical energy
Cycling
Chemical potential energy
Kinetic energy
Source of energy: The Sun
Sources of energy
Wind
Fossil fuels
Water
Food
Sun
Plants make food.
Light energy is
converted to chemical
potential energy
Plants are buried under soil.
They turn into coal which is
then dug up and burnt to
produce electricity.
Electricity converted to:
Heat
Light
Sound
Kinetic