Science

Some Natural Phenomena

Question:

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?

Answer:

The destructive energy of an earthquake is measured by the Richter scale. This scale has the readings from 1 to 10.The reading of magnitude 3 on the Richter scale would be recorded by a seismograph.If the Richter scale gives a reading of magnitude 3, then the earthquake is not likely to cause much damage. Generally,earthquake of magnitudes higher than 5 is considered destructive in nature.
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Questions and Answers

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?
Answer

Q 2.

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?
Answer

Q 3.

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

Q 4.

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

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?
Answer

Q 6.

Suggest three measures to protect ourselves from lightning.
Answer

Q 7.

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

Q 8.

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

Q 9.

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