Which constituent in the air is the Plant nutrient?
Nitrogen
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20
On a sunny day, does a bird or an aeroplane flying high in the sky cast its shadow on the ground? Under what circumstances can we see their shadow on the ground?
No. They are at very high altitude due to which the ground which acts as screen for the shadow is far away.
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10
Which gas supports Burning?
Oxygen
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20
Explain about the image formation in Pinhole Camera.
The image formed in Pinhole camera will be diminished, inverted and real image.
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heart
Other team wins 25 points!
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shark
Other team loses 15 points!
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fairy
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thief
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10
The two gases which together make up about 99% of the air are
Nitrogen and Oxygen
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10
What are three things required to form a shadow
Opaque object, Screen, Light source
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10
Mention any three properties of air.
Air is present everywhere around us. Moving air is called wind. âAir is Transparent âAir occupies space