Chapter 15: Air Around Us

Topic 1: Is air present everywhere?

Topic 2: Air occupies space   

Topic 3: Air has weight  

Topic 4: Water contains air

Topic 5: Water vapour

Topic 6: Soil has air in it 

Topic 7: How trees replace  oxygen back to the atmosphere?  

Topic 8: A wind mill

Multiple choice questions

True or false

Questions and answers


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