Choose the incorrect statement. A. Air has weight. B. Air occupies space. C. Air is dissolved in water. D. Carbon dioxide makes 21% of air.
D. Carbon dioxide makes 21% of air.
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lifesaver
Give 20 points!
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seesaw
Swap points!
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shark
Other team loses 25 points!
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baam
Lose 20 points!
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10
Name the instrument shown. What is its use?
Weather cock, to find the direction of wind
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10
How do plants and animals help each other in exchange of gases in the atmosphere?
Animals and plants use oxygen during respiration and release carbon dioxide gas in air. But green plants also release oxygen gas by taking CO2 during photosynth
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10
List five activities that are possible due to presence of air.
The activities that are possible due to the presence of air, are: (a) To make a simple firki (b) To make a weather cock (c) To breathe for survival (d) For burn
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10
How will you prove that soil particles have air in between?
Take a glass tumbler and add some soil in it. Then pour some water on the soil slowly and stir for a while. The air bubbles start coming out of the soil. This p
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heart
Other team wins 5 points!
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magnet
Take 20 points!
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shark
Other team loses 15 points!
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lifesaver
Give 5 points!
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baam
Lose 20 points!
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fairy
Take points!
5
10
15
20
25
gift
Win 15 points!
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banana
Go to last place!
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10
Write one function of windmill.
To produce electricity.
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10
Through a pie diagram, mention various components of air and their percentage.
Image
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10
How will you show that air is dissolved in water?
Take some water in a glass vessel or beaker. Heat it slowly on a tripod stand. Before the water begins to boil, look carefully at the inner surface of the vesse
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10
Explain why mountaineers carry oxygen cylinders with them?
As you go up, above the sea-level the atmospheric pressure goes on decreasing and the amount of oxygen also decreases at higher altitude.
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10
Give one word: 1. Air in motion, 2. Most abundant gas in the air, 3.
