ENERGY
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ENERGY SCIENCE 5th 2nd TERM
Transcript of ENERGY
ENERGY
SCIENCE 5th2nd TERM
WHAT IS ENERGY?
• Energy is the power that allows us to do things.• We can’t see it or touch it but it’s all around us.• Energy produces all the changes around us. • Energy can take form or light, sound, heat or
movement. It can power machines. • It can change from one form to another too.
For example, when you turn on a light, the electricity transforms into light and thermal energy.
FORMS OF ENERGY
• There are six forms of energy:
• LIGHT ENERGY• SOUND ENERGY• HEAT ENERGY (thermal)• ELECTRICAL ENERGY • CHEMICAL ENERGY• MECHANICAL ENERGY (kinetic)
LIGHT ENERGY
• Everything that produces light.• It could be natural like the Sun, or man-made
like light bulbs and candles.
ENERGY LIGHT
• We need light when it’s dark because we can’t see anything. Light illuminates objects and allows us to see shapes, colours and sizes.
• Light is the fastest form of energy. It travels at 300.000km per second.
• Light looks white but it’s made up of seven different colours: red, orange, yellow, green, blue, indigo and violet.
ENERGY LIGHT
• Light always travels in a straight line until something gets in its way.
• When that happens, light can be absorbed, reflected or refracted (pass through), depending on what kind of surface it hits.
