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Science Class 1 - Air And-Water Notes

Comprehensive study notes for Class 1 - Air And-Water olympiad preparation

Air and Water

Welcome to the chapter on Air and Water for Class 1. In this chapter, you will learn what air and water are, why they are important, and how we use them every day. By the end of this chapter, you will be able to tell where we find air and water and how to keep them clean!

Introduction

Air and water are all around us. All living things need air and water to live. We cannot see air, but we can feel it. Water is a clear liquid that we drink and use every day.

Key Concepts

  • Air: What we breathe; it is everywhere.
  • Water: A clear liquid we drink and use.
  • Uses: We need air and water to live and do many things.

1. What is Air?

Air is all around us, even though we cannot see it. We need air to breathe. Plants, animals, and people all need air.

  • We feel air when the wind blows.
  • Air helps us fly kites and dry our clothes.
  • Birds and airplanes move in the air.

2. What is Water?

Water is a clear liquid. We drink water when we are thirsty. All living things need water to live.

  • Plants need water to grow.
  • Fish and other water animals live in water.
  • We use water to wash, cook, and clean.

3. Uses of Air and Water

  • We breathe air.
  • We drink water.
  • Air helps to burn things (like lighting a candle).
  • Water is used for bathing, cooking, and watering plants.

4. Sources of Water

  • Rain
  • Rivers
  • Lakes
  • Wells
  • Ponds

5. Keeping Air and Water Clean

  • Do not throw garbage in water.
  • Do not burn waste that makes the air dirty.
  • Plant more trees to keep the air clean.
  • Always drink clean water.

Fun Activity: Find and Feel!

Go outside and feel the air on your face. Can you see it? Can you feel it? Fill two glasses: one with clean water and one with dirty water. Which one would you like to drink?

Summary

  • Air and water are needed by all living things.
  • We use air and water every day.
  • We must keep air and water clean.

Practice Questions

Try these questions to test your understanding:

  1. Why do we need air?
  2. Name two uses of water.
  3. Where do we get water from?
  4. How can we keep air clean?
  5. Can we see air?

Challenge Yourself

  • Draw a picture showing how you use water at home.
  • List three things that need air to live.

Did You Know?

  • Fish take in air from water using their gills!
  • The Earth is called the "Blue Planet" because there is so much water on it.

Glossary

  • Air: What we breathe; it is all around us.
  • Water: A clear liquid we drink and use every day.
  • Source: Where something comes from (like rain is a source of water).

Answers to Practice Questions

  1. We need air to breathe and live.
  2. Drinking and bathing (or any two: cooking, washing, watering plants).
  3. Rain, rivers, lakes, wells, ponds.
  4. By not burning waste and planting more trees.
  5. No, we cannot see air, but we can feel it.

Remember, air and water are precious. Use them wisely and keep them clean!

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