Science

Some Natural Phenomena

Question:

The weather department has predicted that a thunderstorm is likely to occur on a certain day. Suppose you have to go out on that day. Would you carry an umbrella?

Answer:

No. We should not carry an umbrella in a thunderstorm. During thunderstorms, which are accompanied with lightning, electric discharge from the clouds can travel through the metallic rod of the umbrella. This may give an electric shock to the person who is carrying it. Hence, it is not safe to carry an umbrella during lightning.
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Some Natural Phenomena

Q 1.

Explain why a charged balloon is repelled by another charged balloon whereas an uncharged balloon is attracted by another charged balloon?

Q 2.

Describe with the help of a diagram an instrument which can be used to detect a charged body.

Q 3.

Name the scale on which the destructive energy of an earthquake is measured. An earthquake measures 3 on this scale. Would it be recorded by a seismograph? Is it likely to cause much damage?

Q 4.

Suppose you are outside your home and an earthquake strikes. What precaution would you take to protect yourself?

Q 5.

The weather department has predicted that a thunderstorm is likely to occur on a certain day. Suppose you have to go out on that day. Would you carry an umbrella?

Q 6.

Suggest three measures to protect ourselves from lightning.

Q 7.

Explain why a charged body loses its charge if we touch it with our hand.

Q 8.

List three states in India where earthquakes are more likely to strike.

Q 9.

Sometimes, a crackling sound is heard while taking off a sweater during winters.