Q1: What type of electric charge is acquired by a rubber balloon when rubbed with a woolen cloth?
Q2: Sometime, a crackling sound is heard while taking off sweater during winters. Explain.
Q3: Explain why a charged balloon is repelled by another charged balloon whereas an uncharged balloon is attracted by another charged balloon?
Q4: What causes lightning in the sky?
Q5: List three states in India where earthquakes are more likely to strike.
Q6: 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.
Q7: What will you do to protect yourself from lightning if you are in an open field?
Q8: What precautions would you take to protect yourself during an earthquake if you are at home?
Q9: What are the two kinds of electric charges?
Q10: What happens when plates brush past one another, or a plate goes under another due to collision?
Q11: When a charged refill is touched with the metal top of an electroscope, its aluminium leaves diverge. Give reason.
Q12: What is lightning conductor? How does it work?
Q13: 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?
Q14: How will you charge a glass rod by the method of friction?
Q15: Why is it not safe to stay under a tree during a thunderstorm?
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1. What are some examples of natural phenomena? |
2. How do natural phenomena affect our daily lives? |
3. What causes natural phenomena like earthquakes and volcanoes? |
4. Can natural phenomena be predicted? |
5. What role do natural phenomena play in Earth's ecology? |
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