The two gases which together make up about 99% of the air are
Nitrogen and Oxygen
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10
Identify the objects in the picture as luminous and non-luminous.
Non-Luminous objects.
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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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boom
Lose 50 points!
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star
Double points!
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shark
Other team loses 25 points!
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lifesaver
Give 25 points!
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5
Weather cock shows the direction of
wind
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15
Define Dispersion
The white light after passing through a prism splits into seven different colours called as Dispersion.
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lifesaver
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shark
Other team loses 10 points!
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shark
Other team loses 10 points!
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thief
Give points!
5
10
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25
20
Animals and plants are interdependent on each other. Justify the statement.
Animal release carbon dioxide gas while breathing which plants intake for photosynthesis.
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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
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10
What are three things required to form a shadow
Opaque object, Screen, Light source
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10
Which constituent in the air is the Plant nutrient?
Nitrogen
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5
Moving air is called as
Wind
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15
What is Reflection
Bouncing back of light after hitting a surface is called as Reflection