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Class 8 Science Chapter 12 Question Answers - Some Natural Phenomena
CBSE CLASS CHAPTER NO.15 SOME NATURAL PHENOMENA: Question Banks
1. How many types of charges exist?
a. One b. Three c. Two d. Four
2. Who invented the lightning conductor?
a. Alexander Fleming b. Graham Bell
c. Benjamin Franklin d. Thomas Alva Edison
3. What device is used to protect building from lightning?
a. Crescograph
b. Anemometer
c. Lightning Conductor
d. Barometer
4. What scale is used to measure the magnitude of earthquake?
a. Richter b. Celsius c. Fahrenheit d. Kilogram
5. The magnitude of earthquakes that occurred at Bhuj and Kashmir were
a. less than 4
b. less than 2
c. less than 6
d. Higher than 7
6. Name 2 natural phenomena which cause us heavy damage.
7. Why were the people of ancient times afraid of lightning?
8. What is lightning due to?
9. What was the discovery made by Ancient Greeks?
10. List two daily life examples where charges are produced.
11. What are charged objects?
12. How can you charge the following objects?
a. glass rod b. Ebonite rod
13. How can we get the following charges?
a. Positive charge b. Negative charge
14. What is the principle of an electroscope?
15. Distinguish static electricity from electric current.
16. Like charges _________ and unlike charges____________each other.
17. What is an earthquake?
18. The weak zones where earthquakes occur are called _____________ zones.
19. A lightning conductor provides a ______ ______ for the transfer of charges to the ground.
20. The magnitudes of earthquakes lesser than ___________ on Richter scale does not cause severe damage.
21. What are the various causes for earth quakes?
22. Write any three harmful effects of an earthquake.
23. Name the three layers of the earth.
24. Suggest any 3 measures to protect ourselves from lightning.
25. Rearrange the steps in the formation of lightning in the form of a flow chart. Air become charged, accumulation of charges, movements of air currents and water droplets, streaks of light and sound are produced.
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FAQs on Class 8 Science Chapter 12 Question Answers - Some Natural Phenomena
| 1. What are natural phenomena? |  |
Ans. Natural phenomena are the occurrences in nature that cannot be controlled by humans. They include various natural events like lightning, earthquakes, thunderstorms, tornadoes, hurricanes, and volcanic eruptions.
| 2. What causes lightning? | |
Ans. Lightning is caused by the buildup of static electricity in the atmosphere. When this buildup becomes too great, it discharges in the form of a lightning bolt. Lightning can occur between clouds, from a cloud to the ground, or from the ground up to a cloud.
| 3. What is an earthquake? | |
Ans. An earthquake is a natural phenomenon that occurs when two tectonic plates in the Earth's crust suddenly slip past one another, releasing energy in the form of seismic waves. This can cause the ground to shake and tremble, and can also result in damage to buildings and other structures.
| 4. What causes a tornado? | |
Ans. A tornado is a type of natural disaster that is caused by a powerful rotating column of air. These columns of air are often formed during thunderstorms, and can be incredibly destructive when they touch down on the ground. Tornadoes can be particularly dangerous because they can move quickly and unpredictably.
| 5. What is a hurricane? | |
Ans. A hurricane is a large, powerful storm that forms over warm ocean waters. Hurricanes are characterized by strong winds, heavy rains, and storm surges that can cause flooding and other damage. These storms can be incredibly dangerous, and it is important to take appropriate precautions to stay safe in the event of a hurricane.
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