Printable Air Around Us class 6 Worksheet with Answers Mcq Included
Air Around Us Class 6 Worksheet With Answer MCQ Included - PDF
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class 6 air around us - what is air class 6
Air is everywhere around us. It's a mixture of many gases, including oxygen, nitrogen, carbon dioxide, and rare gases, all mixed with water. Air is necessary for life, and no living thing can exist without it.
What is the Atmosphere?
The atmosphere is a thick blanket of air that covers the Earth's surface up to 500 km. It does important jobs like protecting us from UV rays of the sun, maintaining the water cycle and Earth's temperature, and providing oxygen for breathing.
Properties of Air
Air has some interesting properties:
- It's colorless, tasteless, and odorless.
- It has mass and takes up space.
- It can dissolve in water and be compressed.
Constituents of Air
Air consists of gases like hydrogen, oxygen, nitrogen, carbon dioxide, and others, with dust particles. Each gas has unique properties and roles in the creation of life.
Uses of Air
Air is made of different gases with specific uses:
- Nitrogen: It controls burning, helps plants grow, and is used in drugs, dyes, and food preservation.
- Oxygen: It is needed by all living things for breathing and helps in burning fuel.
- Carbon dioxide: Essential for photosynthesis and respiration, and used in soft drinks, dry ice, and fire extinguishers.
- Water Vapour: Causes evaporation and forms clouds, affecting humidity.
- Dust and Smoke: Found in air, affecting cleanliness.
Oxygen Cycle and Ozone Layer
The oxygen cycle maintains the oxygen level through photosynthesis and respiration. Cutting trees and urbanization affect this balance and cause global warming. The ozone layer absorbs UV rays and protects us from eye problems and skin cancer.
Uses Of Air
Air has many uses:
- It helps spread pollen grains and seeds.
- Generates electricity through windmills.
- Inflates vehicle tires.
- Essential for respiration, photosynthesis, and flying objects like airplanes.
AIR POLLUTION
When harmful materials like smoke mix with air, they pollute it. Causes include emissions from factories, burning coal and fuel, volcanic eruptions, forest fires, and decay of vegetation. Air pollution can lead to lung disorders and eye problems.
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