MCQ Questions for Class 8 Science: Ch 15 Some Natural Phenomena

MCQ Questions for Class 8 Science: Ch 15 Some Natural Phenomena

1. The power of an earthquake is expressed on a scale called
(a) seismic scale
(b) iron scale
(c) richter scale
(d) large scale
► (c) richter scale

2. The shaking of earth is called:
(a) tsunami
(b) volcano
(c) earthquake
(d) all of these.
► (c) earthquake

3. Static electricity charges can be produced by
(a) Heating
(b) Rubbing
(c) Beating
(d) none of these
► (b) Rubbing

4. Why is a lightning conductor installed on a building?
(a) So that it collects the electric power present in the lightning
(b) So that it repels the lightning that falls on the building
(c) So that it forces the lightning to fall in an area where there are no buildings
(d) So that it conducts electric charge to the ground when lightning strikes the building
► (d) So that it conducts electric charge to the ground when lightning strikes the building

5. Which of the following allows the transfer of electric charge from one charged object to another?
(a) Vacuum
(b) Air
(c) Insulator
(d) Conductor
► (d) Conductor

6. Sparks can be seen on an electric pole when wires become
(a) loose
(b) tight
(c) wrinkle
(d) none
► (a) loose

7. What happens when an ebonite rod rubbed with fur and a glass rod rubbed with silk are brought near each other?
(a) They attract each other.
(b) They repel each other.
(c) Nothing happens to them.
(d) They acquire heat.
► (a) They attract each other.

8. Which of the following is not a natural phenomenon?
(a) Cyclone
(b) Lightening
(c) Cooking
(d) Earthquake
► (c) Cooking

9. Which layer of the earth is exposed to the atmosphere?
(a) Outer core
(b) Mantle
(c) Inner core
(d) Crust
► (d) Crust

10. The like charges:
(a) repel each other
(b) attract each other
(c) no interaction takes place
(d) all of these
► (a) repel each other

11. The outermost layer of earth is called
(a) Mountain
(b) Core
(c) Crust 
(d) Mantle
► (c) Crust 

12. The process of transferring a charge from a charged body to the earth is called
(a) Hydrolysis
(b) Electrolysis
(c) Earthing
(d) Discharging
► (c) Earthing

13. The resin which produces spark is
(a) gum
(b) amber
(c) both (a) and (b)
(d) none of these
► (b) amber

14. Which of the following state India is not likely to be affected by earthquake?
(a) Rajasthan
(b) Uttar Pradesh
(c) Jammu Kashmir
(d) Gujarat
► (b) Uttar Pradesh

15. Earthquakes are caused by the
(a) Tilting of earth axis
(b) Movement of water inside
(c) High pollution level
(d) Movement of earth plates
► (d) Movement of earth plates

16. Lightening conductor is made up of
(a) Metal
(b) Cotton
(c) Non-metal
(d) Wooden
► (a) Metal

17. Lightening is _________ on huge scale.
(a) Magnetic effect
(b) Electric spark
(c) Electro-magnetic effect
(d) Heating effect
► (b) Electric spark

18. When you touch a charged body, the charge flows through you into the earth. What is this called?
(a) Induction
(b) Conduction
(c) Capacitance
(d) Earthing
► (d) Earthing

19. What is the purpose of an electroscope?
(a) To detect and test small electric charges
(b) To calculate the amount of electric charge flowing through the conductor
(c) To find out the presence of antimatter
(d) To test the presence of magnetic field
► (a) To detect and test small electric charges

20. The boundaries of earth
(a) Fault zones
(b) Poor zone
(c) Volatile zone
(d) Default zone
► (a) Fault zones

21. The earth’s plate responsible for causing earthquakes is
(a) The inner core of the earth
(b) The mantle of the earth
(c) The crust of the earth
(d) The outer core of the earth
► (c) The crust of the earth

22. Suppose you are in a car and there is a thunderstorm. Which of the following is the best way to protect yourself from possible harm?
(a) Remaining in the car
(b) Getting out of the car and taking cover under the car
(c) Running to a nearby tree
(d) Getting out and standing under an electric pole
► (a) Remaining in the car

23. Lightning occurred when two charges meet they are
(a) both positive
(b) both negative
(c) one positive and other negative
(d) none
► (c) one positive and other negative

24. Building can be protected from lightning by using
(a) Lightning rod on the levels of building
(b) Wooden logs at the top of building
(c) Lightning rod at the top of building
(d) All of these
► (c) Lightning rod at the top of building

25. Interaction of charges is called:
(a) lightning
(b) electrical discharge
(c) earthquake
(d) earthing
► (a) lightning
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