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6th Air Around us

1)

Have you ever seen air?
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2)

Why do you think mountaineers carry oxygen cylinders with them, while climbing high mountains?
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3)

Why do traffic policemen wear mask with charcoal lining?
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4)

Why the transparent glass of windows if not wiped off regularly appear hazy?
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5)

Why during an incident of fire, one is advised to wrap a woollen blanket over the burning object?
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6)

Will the tiny air bubbles seen before the water actually boils also appear if we do this activity by reheating boiled water kept in an air tight bottle?
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7)

How air is important for life on Earth?
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8)

What is the composition of air?
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9)

Which gas in the atmosphere is essential for respiration?
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10)

How will you prove that air supports burning?
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11)

How will you show that air is dissolved in water?
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12)

Why does a lump of cotton wool shrink in water?
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13)

The layer of air around the earth is known as...
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14)

The component of air used by green plants to make their food, is...
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15)

List five activities that are possible due to the presence of air.
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16)

How do plants and animals help each other in the exchange of gases in the atmosphere?
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