Forms, Uses and Sources of Energy

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Plants are eaten by other organisms Chemical potential energy in the plants are transferred to organisms and is converted to other forms of energy. Example: Heat Kinetic

Light and heat energy from the Sun

Plants are buried under soil. They turn into coal which is then dug up and burnt to produce electricity.

Electricity converted to:

Kinetic

Sound

Light

Heat

Plants make food. Light energy is converted to chemical potential energy

Forms, Uses and Sources of Energy

Sources of energy

Food

Water

Fossil fuels

Wind

Source of energy: The Sun

Conversion of energy

Energy cannot be created nor destroyed. It can only be converted from one form to another

Cycling

Chemical potential energy Kinetic energy

Solar cells

Light energy Electrical energy

Power plant

Chemical potential energy Heat energy Kinetic energy Electrical energy

Hydroelectric dam

Gravitational potential energy( of water in dam) Kinetic energy(of water) Kinetic energy(of turbine) Electrical energy (of generator)

Energy

Examples

Light energy

A form of energy that allows us to see

Uses

Producing electricity

Photosynthesis

Seeing

Heat energy

A from of energy that makes objects hot or cold

Sources of heat

Electric kettle

Light bulb

Fire

Heater

Sun

Sound energy

A form of energy that allows us to hear

Needs a medium to move through

Produced when something vibrates

Electrical energy

A form of energy that is widely used and can be converted to other forms

Kinetic energy

A form of energy that is present in ALL moving objects

Affected by:

Speed of an object

Mass of an object

Potential energy

Elastic potential energy

Present in stretched or compressed elastic objects

Compressed spring

Stretched rubber band

Chemical potential energy

Present in all objects

Gravitational potential energy

Present in anything that is ABOVE GROUND

Means " the ability to do work"