Science

Some Natural Phenomena

Question:

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

Answer:

Some of the precautions are as follows:
(i)Try to find an open field away from tall buildings, installations, tall trees, and electric wires and poles.
(ii)If travelling in a bus or a car, then do not come out when an earthquake strikes. Ask the driver to drive in an open field.
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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.

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

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.

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

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.