Demo

EFFECTS OF ENERGY
Objectives

By the end of the subtopic learners should be able to:
Define energy and state its characteristics. Identify sources of energy. Describe the effects of energy.

Effects of energy

Energy is the ability to do work.
Energy is what makes things happen.
We cannot touch energy.
We cannot see energy.
Energy can neither be created nor destroyed, it can only be changed from one form to another.

What does energy do?

Energy make things change shape.
Energy can destroy things
Energy make things move.
Energy can make food to be cooked.
Energy can make live things to grow.

Energy makes things happen:

Stretching a rubber band

Running

Burning fire

Light bulb

Train

Weight lifting

Pressing spring

Bouncing ball

Catapult

Sources of energy

Firewood

Petrol

Candle

Sweets

Hand gas

Bread

Battery cells

Candle light

Drums

Torch light

Heater

Torch bulb and a battery cell

SUMMARY

Energy is that which is required to make objects move and make things happen.
Activities such as running up a hill, lifting bricks, pushing a car or wheelbarrows are as a result of using energy.