Class 3 - EVS

Learning Objectives

Students will be able to list the different uses of water in daily life.
Students will be able to name the sources of water.
Students will be able to explain the difference between clean water and dirty water.
Students will be able to describe ways to save water.

Let Us Begin!

What is the first thing you do when you feel thirsty? You drink water! Water is one of the most important things we need every day.

We use water for drinking, cooking, bathing, washing, and so much more. Plants and animals also need water to live.

Let us learn about water -- where it comes from, how we use it, and why we must save it!

Uses of Water

We use water in many ways every day:

Drinking -- We drink water to stay healthy. Our body needs water every day.
Cooking -- We use water to cook rice, dal, and vegetables.
Bathing and Washing -- We use water to take a bath, wash clothes, and clean dishes.
Cleaning -- We use water to mop the floor and clean our home.
Watering Plants -- Plants need water to grow and stay green.
Farming -- Farmers use water to grow crops like rice, wheat, and vegetables.

Think about it: Can you imagine a day without water? It would be very hard! We need water for almost everything.

Sources of Water

Where does water come from? Water comes from many places. These are called sources of water.

Source	What It Is
Rain	Water falls from clouds in the sky. Rain fills rivers, lakes, and wells.
River	A large stream of flowing water. Examples: Ganga, Yamuna, Kaveri.
Lake	A big body of still water surrounded by land.
Well	A deep hole dug in the ground to get water from below.
Tap	Water that comes to our homes through pipes from a water tank or river.
Hand Pump	A pump used to pull water from under the ground, seen in villages.

Where does the water in your home come from? Is it from a tap, a hand pump, or a well?

Clean Water and Dirty Water

Clean water is water that is safe to drink. It has no colour, no smell, and no dirt. We should always drink clean, filtered, or boiled water.

Dirty water has germs, mud, or waste in it. Drinking dirty water can make us very sick. We can get diseases like diarrhoea and cholera from dirty water.

We should never drink water from ponds, puddles, or dirty rivers.

Key Words and Meanings

Word	Meaning
Source	The place where something comes from
Rain	Water that falls from clouds in the sky
Well	A deep hole in the ground to get water
Clean water	Water that is safe and pure for drinking
Dirty water	Water that has germs or dirt and is not safe to drink
Save	To use carefully and not waste

How to Save Water

Water is precious. We must not waste it. Here are some easy ways to save water:

Turn off the tap while brushing your teeth or soaping your hands.
Do not let the tap run when it is not needed.
Use a bucket and mug for bathing instead of a shower.
Fix leaking taps at home.
Water plants in the morning or evening, not in the hot afternoon.
Collect rainwater in buckets -- it can be used for watering plants.

Key Points to Remember

Water is needed for drinking, cooking, bathing, washing, and farming.
Sources of water: rain, river, lake, well, tap, and hand pump.
Clean water is safe to drink. Dirty water has germs and makes us sick.
Always drink filtered or boiled water.
Save water by turning off taps, fixing leaks, and using a bucket for bathing.

Examples from Daily Life

Example 1: Water at Home

Every morning, Sita's mother fills water from the tap for cooking and drinking. She boils the water before the family drinks it. This keeps the family safe from germs.

Example 2: Saving Water

Rahul always turns off the tap while brushing his teeth. He uses a mug and bucket for his bath. His father says, "Every drop of water is important." Rahul is a water saver!

Example 3: Water for Farming

In the village, farmers wait for the monsoon rain to fill their fields with water. Without rain, the crops cannot grow and there will be less food for everyone.

Practice Questions

A. Fill in the Blanks

Water that falls from clouds is called .
We should always drink water.
A deep hole dug in the ground to get water is called a .
Drinking dirty water can cause .
We should turn off the while brushing our teeth.

B. Multiple Choice Questions

Which of these is a source of water?
(a) Road(b) River(c) Tree(d) Rock
Which water is safe to drink?
(a) Pond water(b) Puddle water(c) Boiled water(d) Drain water
How can we save water at home?
(a) Keep the tap running(b) Use a bucket for bathing(c) Waste water(d) Never close the tap

C. Short Answer Questions

Write four uses of water in our daily life.
Name four sources of water.
Write three ways you can save water at home.

Think and Do -- Fun Activity

Water Diary: For one day, write down every time you use water. Count how many times you used water and think about where you can save.

Time	What I Used Water For	Could I Have Saved Water? (Yes / No)
Morning
Morning
Afternoon
Afternoon
Evening
Night

Total times I used water today: __________

Science / EVS -- Class 3

Science / EVS -- Class 3 (continued)