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Energy is the ability to do work. Living things need energy to carry out life processes

such as..

a) breathingb) growingc) moving

Energy that is needed for growing from food. Non- living things also needed energy to make

them usable.

A car needs energy to make it move.

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A ball needs energy to make it bounce. Energy is needed to boil water. Ice also needs energy to melt. We use energy to do work such as

following:

a) pushing a trolleyb) carrying a bag

c) runningd) jumping We cannot do any work without

energy.

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The sun Water

Food Wind Fuel Battery

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Sun

- the main source of energy.- produces light and heat.- we use the heat energy from the sun to

dry our laundry.- to keep our bodies warm.- plants use sunlight to make food through

photosynthesis.- the following forms of energy comes

from the sun.

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- the following forms of energy comes

from the sun.a) energy stored in water.b) energy stored in wind.c) energy stored in plants.d) energy stored in animals.

e) energy stored in fuels.

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Water

- moving or falling water produces energy.- energy of moving water is used to

generate electricity.

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Food

- food contains stored energy.- living things get energy when they

eat food.

- humans and animals get food fromplants and other animals.- plants make their own food by

using sunlight, water and carbondioxide.

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Wind

- moving air.- wind is used to pump water.

- wind is used to make things move.- wind energy is used to powerwindmills and to move ships.

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Fuel

- fuels are materials that burn toproduce heat energy.

- examples of fuels are wood,petroleum, natural gas and coal.

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Battery

- device that generated electrical energyfrom chemical energy.

- device that supply energy to produce

electricity.- batteries are used to power electricalappliances such as a torch, alarm clock

and radio.

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TRANSFORMATION OF

ENERGY

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Energy exists in different forms.

The various form of energy are as shown In

the diagram below. Forms of energy :

a) Electrical energy

b) Kinetic energyc) Light energy

d) Heat energy

e) Potential energy

f) Sound energyg) Chemical energy

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Electrical energy

a) produced when electricity flows.

b) used in electrical appliances suchas the television and computer.

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Kinetic Energy

- all objects that are moving have kineticenergy.

- for example, the wind and a person who is

walking have kinetic energy.

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