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# Solutions 15. Some Natural Phenomena - Text Book Exercise | Class 8 Science - Toppers Study

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## Solutions 15. Some Natural Phenomena - Text Book Exercise | Class 8 Science - Toppers Study

CBSE board students who preparing for class 8 ncert solutions maths and Science solved exercise chapter 15. Some Natural Phenomena available and this helps in upcoming exams 2023-2024.

### You can Find Science solution Class 8 Chapter 15. Some Natural Phenomena

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• NCERT Solutions And Textual questions Answers Class 8 Science
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Chapter 15 Science class 8

### Text Book Exercise class 8 Science Chapter 15. Some Natural Phenomena

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• Solutions 15. Some Natural Phenomena - Text Book Exercise | Class 8 Science - Toppers Study
• Class 8 Ncert Solutions
• Solution Chapter 15. Some Natural Phenomena Class 8
• Solutions Class 8
• Chapter 15. Some Natural Phenomena Text Book Exercise Class 8

## Exercise

1. 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.

(b) A copper rod.

2. 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.

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

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

(a) Like charges attract each other (T/F)

(b) A charged glass rod attract a charged plastic straw (T/F)

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

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

(a)-f (b)-t (c)-f (d)-f

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

A crackling sound is heard because when the sweater is rubbed while taking it, off, it acuquires a small charge.

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

Our body is a conductor of electricity. When we touch a charged body loses charge to the earth through our body.

6. 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?

The destructive energy of an earthquakq is measured on a scale called Richter scale.

An earthquake that meausure 3 on the Richter scale will be recorded by seismograph However, it is not likely to cause much damage.

7. Suggest three measures to protect ourselves from lightning.

(i) We should rush to a safer place like house or building.

(ii)

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

A charged ballon is replled by another ballon beecause both have the same charge. And we know similar charges repel each oother.

Butt a charged ballon attracts an uncharged ballon and lose itts own charge too the other ballon.

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

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