1. NCERT Solutions - Science , Class 8
1. Crop Production and Management
2. Microorganisms: Friend and Foe
3. Synthetic Fibres and Plastic
4. Materials: Metals and Non-Metals
5. Coal and Petroleum
6. Combustion and Flame
7. Conservation of Plants and Animals
8. Cell — Structure and Functions
9. Reproduction in Animals
10. Reaching the Age of Adolescence
11. Force and Pressure
14. Chemical Effects and Electric Current
15. Some Natural Phenomena
17. Stars and the Solar System
18. Pollution of Air and Water
Q1) 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.
Q2) When a glass rod is rubbed with a piece of silk cloth the rod:-
Q3) 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)
Q4) Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain.
Q5) Explain why a charged body loses its charge if we touch it with our hand.
Q6) 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?
Q7) Suggest three measures to protect ourselves from lightning.
Q8) Explain why a charged balloon is repelled by another charged balloon whereas an uncharged balloon is attracted by another charged balloon?
Q9) Describe with the help of a diagram an instrument that can be used to detect a charged body
Q10) List three states in India where earthquakes are more likely to strike.
Q11) Suppose you are outside your home and an earthquake strikes. What precaution would you take to protect yourself?
Q12) 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.
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NCERT Solutions - Science , Class 8
Crop Production and Management
Microorganisms: Friend and Foe
Synthetic Fibres and Plastic
Materials: Metals and Non-Metals
Coal and Petroleum
Combustion and Flame
Conservation of Plants and Animals
Cell — Structure and Functions
Reproduction in Animals
Reaching the Age of Adolescence
Force and Pressure
Chemical Effects and Electric Current
Some Natural Phenomena
Stars and the Solar System
Pollution of Air and Water
Race To Space
Terms & Policies