The atmosphere is the air that envelops the planet. The atmosphere is required for life to exist on Earth. The Earth’s atmosphere is made up of roughly 78% nitrogen and 21% oxygen. There are also trace amounts of other gases in the air, such as carbon dioxide, neon, and hydrogen. All living things require oxygen, which promotes combustion. Both water and soil contain air.
Aquatic creatures breathe by inhaling water-dissolved air. Plants and animals rely on one another to exchange oxygen and carbon dioxide from the air.
Plants play an important role in maintaining the balance of oxygen and carbon dioxide in the atmosphere through the process of photosynthesis.
Download PDF of Class 6 Chemistry Chapter 15 Air Around Us – Set 1
CBSE Class 6 Chemistry Worksheet Chapter 15 Air Around Us – Set 1
Q1. Which of the following gas is not a component of air?
a.) Nitrogen
b.) Chlorine
c.) Oxygen
d.) Argon
Q2. A gas that maintains the Earth’s temperature is _______.
a.) Carbon dioxide
b.) Nitrogen
c.) Hydrogen
d.) Oxygen
Q3. The amount of water vapour in the air is _______.
a.) Dew
b.) Mist
c.) Humidity
d.) Fog
Q4. Fill in the blanks.
a.) The thin layer of gases around the Earth is called ____.
b.) Air occupies ____.
c.) Plants use ____ during photosynthesis and ____ during respiration.
Q5. State true or false.
a.) Nitrogen supports combustion.
b.) Air contains water vapour.
c.) The amount of oxygen decreases with altitudes.
Q6. Why is air considered a mixture?
Q7. State the properties of air.
Q8. What are the functions of long chimneys in factories?
Q9. Why do animals that live deep within the soil emerge during heavy rains?
Q10. What is the importance of water vapour in the atmosphere?
Q11.The leaves and flowers of roadside plants are comparatively very dull. Why?
Q12. How can you say that animals and plants rely on each other for survival?
Q13. Why do you think mountaineers carry oxygen cylinders with them while climbing high mountains?
Q14. Explain how nature maintains a carbon dioxide and oxygen balance in the atmosphere.
Q15. Write down the uses of air.
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