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NCERT solutions Science Class 8 chapter 15 Some Natural Phenomena

Chapters

NCERT Science Class 8

Science Textbook For Class 8

Chapter 15 - Some Natural Phenomena

Page 197

Which of the following cannot be charged easily by friction?

(a) A plastic scale

(b) A copper rod

(c) An inflated balloon

(d) A woollen cloth

Q 1 | Page 197

When a glass rod is rubbed with a piece of silk cloth the rod

(a) and the cloth both acquire positive charge.

(b) becomes positively charged while the cloth has a negative charge.

(c) and the cloth both acquire negative charge.

(d) becomes negatively charged while the cloth has a positive charge.

Q 2 | Page 197

Write T against true and F against false in the following statements.

Like charges attract each other. (T / F)

Q 3.1 | Page 197

Write T against true and F against false in the following statements.

A charged glass rod attracts a charged plastic straw. (T / F).

Q 3.2 | Page 197

Write T against true and F against false in the following statements.

Lightning conductor cannot protect a building from lightning. (T/F)

Q 3.3 | Page 197

Write T against true and F against false in the following statements.

Earthquakes can be predicted in advance. (T / F)

Q 3.4 | Page 197

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

Q 4 | Page 197

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

Q 5 | Page 197

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 6 | Page 197

Suggest Three Measures to Protect Ourselves from Lightning.

Q 7 | Page 197

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

Q 8 | Page 197

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

Q 9 | Page 197

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

Q 10 | Page 197

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

Q 11 | Page 197

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? Explain.

Q 12 | Page 197

NCERT Science Class 8

Science Textbook For Class 8
S