Class 6 Science Worksheet 15: Air Around Us

Worksheet 15: Class 6 Science - Air Around Us

Welcome! This worksheet will help you understand the air that surrounds us and sustains life. We will learn about what air is made of, its properties, and how it is essential for living things and various processes. Let's explore the atmosphere!

Composition and Properties of Air

Air is a mixture of several gases. The main components are:

• **Nitrogen ($N_2$)**: Makes up about 78% of the air. It is the most abundant gas.
• **Oxygen ($O_2$)**: Makes up about 21% of the air. It is essential for breathing and combustion.
• **Carbon Dioxide ($CO_2$)**: Makes up a very small part of the air. It is used by plants for photosynthesis.
• **Water Vapour and other gases**: Water vapor is present in varying amounts and is responsible for humidity. Other gases like argon and neon are present in very small quantities.

[attachment_0](attachment)

Air has several properties: it **occupies space**, has **weight**, and exerts **pressure**. We cannot see air, but we can feel it when it moves, such as in the form of wind. Air is also crucial for the **water cycle** and for the movement of sailboats and windmills. Without oxygen in the air, no living organism would be able to breathe.

Practice Questions

1. Fill in the blank: The major component of air is _____.

Nitrogen

2. True or False: Air does not have any weight.

False. Air has weight and exerts pressure, which is why we can inflate a balloon.

3. Match the gas to its use:

(a) Oxygen (i) Used by plants for photosynthesis

(b) Carbon Dioxide (ii) Used for breathing and combustion

(c) Nitrogen (iii) Most abundant gas in the atmosphere

a - ii, b - i, c - iii

4. Why do we need oxygen?

All living things need oxygen to breathe and to release energy from food.

5. Fill in the blank: Moving air is called _____.

Wind

6. Explain how air helps in the water cycle.

Air contains water vapor, and moving air (wind) helps in the processes of evaporation and transpiration, which are key parts of the water cycle.

7. Name three properties of air.

Air occupies space, has weight, and exerts pressure.

8. What is the difference between air and wind?

**Air** is the mixture of gases that surrounds us. **Wind** is simply air in motion.