NCERT Class 3 EVS Chapter 3: Water O Water

Why is Water So Important?

Water is essential for all living beings. Human beings, animals, and plants cannot survive without water. We use it for daily chores like drinking, bathing, cooking, cleaning, and watering plants. Have you ever wondered where this water comes from? Rain is the main and primary source of fresh water on Earth. Rainwater fills up natural water bodies like rivers, ponds, lakes, and streams. In our homes, we get water through taps, which are connected to big water tanks that store water from these rivers or deep underground wells. Plants also need water to look green and healthy; without it, they would dry up and die.

Understanding the Three Forms of Water

1. 1. Solid Form (Ice) — When you put water in the freezer, it freezes and becomes hard ice. This is the solid state of water.
2. 2. Liquid Form (Water) — This is the normal, flowing form of water we drink, wash our hands with, and see flowing in rivers.
3. 3. Gas Form (Water Vapour) — When water is boiled, it heats up and turns into steam or invisible gas called water vapour.

Important Tips & Common Mistakes

• Always remember that Rain is the ultimate and primary source of all fresh water on Earth.
• Common Mistake: Thinking that only humans need water. Remember, plants and animals need water just as much as we do to survive!
• Do not waste water. Simple habits like closing the tap while brushing teeth make a huge difference.
• Keep water clean! Never throw garbage or waste into rivers and lakes.

Practice Questions with Solutions

• Q: Why do we need water? Mention any three activities. A: Step 1: Identify that water is essential for survival and daily life. Step 2: List three major activities that require water. Step 3: Write down: Drinking, cooking, and bathing. Final answer: We need water to stay alive. Three activities that require water are drinking, cooking, and bathing.
• Q: Name three natural sources of water and two man-made sources of water. A: Step 1: Identify sources made by nature: Rain, Rivers, and Lakes. Step 2: Identify sources built by humans: Taps and Wells. Final answer: Three natural sources are rain, rivers, and lakes. Two man-made sources are taps and wells.
• Q: What happens to plants if they do not get water for many days? A: Step 1: Understand that plants need water to prepare food and stay healthy. Step 2: Think about what happens when they get dry. Step 3: Explain that they will wither, turn yellow, and eventually die. Final answer: If plants do not get water, they will dry up, wither, and eventually die.
• Q: Suggest two simple ways to save water at home. A: Step 1: Think of easy daily actions kids can do. Step 2: Idea 1 - Turn off the running tap while brushing teeth. Step 3: Idea 2 - Use leftover water in drinking glasses to water plants. Final answer: Two simple ways to save water are: 1) Turn off the tap while brushing your teeth, and 2) Reuse leftover water to water houseplants.

Frequently Asked Questions