Science is nothing but:• observing, • experimenting • and inferring ______

observingexperimentinginferring

Do you remember ?

So let’s think about it……..

How things happen?

It is all about It is all about energyenergy!!

How Things How Things Happen?Happen?

EnergyEnergy

How Things Happen?

Why do you eat food?You eat because you have to get energy for living.You need energy for walking, talking, running, playing, and doing every kind of work.

Animals and plants also need energy. Animal take their kind of food.

Do plants eat food too?No, they do not. They do not eat like animals. Instead they make their food using the sunlight energy.

EnergyEnergy

We have to eat to get energyWe have to eat to get energy

How Things HappenHow Things HappenEnergyEnergy

ENERGY FROM FOOD

Animals, plants and human beings

need energy to do work

EnergyEnergy

carbon diox idecarbon diox idecarbon diox ide

oxygenoxygenoxygen

carbon diox idecarbon diox idecarbon diox ide

day

night

sun light

sugar

carbon dioxide water

This whole process is called photosynthesis.

EnergyEnergy

There are different ways in which animals obtain their food.

But they all need food to get energy.

Food is the fuel for the living engine! In an automobile fuel is burned to get energy in

order to get it moving; Much like the same food is burned in our

bodies; By the process of burning we mean stepwise

chemical breakdown of food in order to release energy

ENERGY FROM ENERGY FROM FOODFOOD

EnergyEnergy

EnergyEnergy

What did you see in the previous slide?Sun is the ultimate source of energy.Plants make food in sunlight from chlorophyll

using salts and water from soil.Many animals depend upon plants for food.We also, directly or indirectly, depend upon

plants for our food.

EnergyEnergy

•Things get moving or working when energy is supplied to them.

Fuel, electricity, wind, heat, light, sound are different kinds of energy

ObjectivesObjectives

After reading this lessonThe children will know that:

EnergyEnergy

Energy is the Key wordEnergy is the Key word•Animals have to eat food

•Plants need to have sunlight, water and minerals to make food

•Machines need fuel

•Every moving thing needs energy

Kinds of energy:light, heat, electrical,

mechanical, chemical, sound, muscular.

heatEnergyEnergy

chemical

lightheat

motion

electrical

potential

muscular

mechanical

EnergyEnergy

ActivitiesMany easy activities can be performed with this kind of lesson.First ask questions in order to revise the lesson thoroughly. Why do living things need energy? What 2 types of energy we get from sun? What do plants do for their food? Why do we need to have petrol or gas for cars? How is a bulb lighted? How does a sail boat move?

EnergyEnergy

Hints for ActivitiesLight a candle and ask children what is happening.

(Heat and light are produced)

Bring battery operated toys, and show the children that

they don’t work if you take out the battery.

Drop a ball on the ground, or roll it on the table

Pick up some pins by a magnet.

Make a child stand in front of a fan with a paper in hand.

Make the children sing National Anthem.

Ring a bell. Tell them sound is also a kind of energy.

Hold the hand of a child tightly, tell them it is the muscular

energy.

EnergyEnergy