Some Natural Phenomena Class 8 MCQs Questions with Answers
I. Choose the correct option.
Question 1.
Like charges
(a) attract each other
(b) repel each other
(c) no interaction takes place
(d) none of these
Answer
Answer: (b) repel each other
Question 2.
Earthquake of which magnitude of the following cause the maximum damage?
(a) 3.0
(b) 8.0
(c) 5.0
(d) 4.0
Answer
Answer: (b) 8.0
Question 3.
Lightning occurs due to
(a) wind
(b) rain
(c) electric discharge
(d) earthquake
Answer
Answer: (c) electric discharge
Question 4.
The shaking and trembling of earth is called
(a) tsunami
(b) volcano
(c) earthquake
(d) none of these
Answer
Answer: (c) earthquake
Question 5.
The magnitude of an earthquake is measured in
(a) Kelvin scale
(b) Celsius scale
(c) Decibel scale
(d) Richter scale
Answer
Answer: (d) Richter scale
Question 6.
Which is the sure test of charge on a body?
(a) Lightning
(b) Combination
(c) Repulsion
(d) Insulation
Answer
Answer: (c) Repulsion
Question 7.
Major earthquakes are less likely to occur in
(a) North-East India
(b) Rajasthan
(c) Rann of Kutch
(d) Odisha
Answer
Answer: (d) Odisha
Question 8.
Tsunami means
(a) floods
(b) earthquake
(c) earthquake under sea
(d) volcanic eruption under sea
Answer
Answer: (c) earthquake under sea
Question 9.
Lightning always follows
(a) rain
(b) thunder
(c) the easiest path
(d) a straight path
Answer
Answer: (b) thunder
Question 10.
The outermost layer of the earth is called
(a) mantle
(b) outer core
(c) crust
(d) inner core
Answer
Answer: (c) crust
Question 11.
Lightning conductor is used
(a) to destroy the buildings
(b) to protect the buildings
(c) both (a) and (b)
(d) none of these
Answer
Answer: (b) to protect the buildings
Question 12.
Types of charges gained by rubbing objects are
(a) 3
(b) 2
(c) 4
(d) 1
Answer
Answer: (b) 2
Question 13.
The process of transfer of charges from a charged object to the earth is called
(a) lightning
(b) oscillation
(c) earthing
(d) electron movement
Answer
Answer: (c) earthing
Question 14.
Where is the lightning conductor located?
(a) In the bottom of the building
(b) On the top of the building
(c) In the middle of the building
(d) Anywhere can be installed
Answer
Answer: (b) On the top of the building
Question 15.
The point from where the shock waves of an earthquake originate is called
(a) epicentre
(b) seismic focus
(c) focal depth
(d) none of these
Answer
Answer: (b) seismic focus
Question 16.
The epicentre of an earthquake is
(a) in the core of earth
(b) on the surface of earth
(c) in the middle of earth
(d) none of these
Answer
Answer: (b) on the surface of earth
Question 17.
Which of the following is not likely to cause tsunami?
(a) Nuclear explosion under sea
(b) Earthquake
(c) Volcanic eruption
(d) Lightning
Answer
Answer: (d) Lightning
Question 18.
The process of electric discharge can occur between
(a) two or more clouds
(b) clouds and the earth
(c) both (a) and (b)
(d) none of these
Answer
Answer: (c) both (a) and (b)
Question 19.
During lightning air is normally
(a) a good conductor
(b) a bad conductor
(c) both (a) and (b)
(d) none of these
Answer
Answer: (a) a good conductor
Question 20.
If two charged objects are brought close to each other then
(a) they will attract each other.
(b) they will repel each other.
(c) they may attract or repel depending on the charges they carry.
(d) there will be no effect between them.
Answer
Answer: (c) they may attract or repel depending on the charges they carry.
II. Fill in the Blanks
Question 1.
Lightning is an __________ on a huge scale.
Answer
Answer: electric spark
Question 2.
The electrical charges generated by rubbing two object is ___________ electricity.
Answer
Answer: static
Question 3.
The electrical charges can be transferred from a _________ object to another through a conductor.
Answer
Answer: charged, metal
Question 4.
The crust and mantle is broken into pieces known as _________
Answer
Answer: tectonic plates
Question 5.
_________ is an instrument that records seismic waves.
Answer
Answer: Seismograph
Question 6.
__________ is the sudden shaking and trembling of the earth.
Answer
Answer: Earthquake
Question 7.
Lightning is always followed by _________
Answer
Answer: thunder
Question 8.
_________ is an earthquake under sea.
Answer
Answer: Tsunami
Question 9.
Transfer of charge to the earth is _________
Answer
Answer: earthing
Question 10.
Richter scale measure __________ of earthquake.
Answer
Answer: magnitude
Question 11.
When two bodies are rubbed against each other, they acquire __________ and __________ charges.
Answer
Answer: equal, unlike
Question 12.
___________ can be charged with static electricity.
Answer
Answer: Insulator
Question 13.
There are two kinds of charges _________ and _________
Answer
Answer: positive, negative
Question 14.
The uppermost layer of the earth is called _________
Answer
Answer: crust
Question 15.
All building especially tall building must be equipped with _________
Answer
Answer: lightning conductor
Question 16.
___________ can save buildings from destruction due to lightning.
Answer
Answer: Lightning conductor
Question 17.
When charges flow, they constitute _________
Answer
Answer: an electric current
Question 18.
The outer layer of the earth is _________
Answer
Answer: fragmented
Question 19.
Interaction of charges is called _________
Answer
Answer: lightning
Question 20.
Benjamin Franklin showed lightning in _________
Answer
Answer: 1752
III. True or False
Question 1.
We can predict an earthquake.
Answer
Answer: False
Question 2.
Richter scale is used to measure earthquake.
Answer
Answer: True
Question 3.
We cannot predict cyclones.
Answer
Answer: False
Question 4.
The electric charges produced by rubbing are called static charges.
Answer
Answer: True
Question 5.
The process of transferring charge from a charged object to the earth is called earthing.
Answer
Answer: True
Question 6.
A device used to protect tall buildings from lightning is called metal detector.
Answer
Answer: False
Question 7.
The plates of the outermost layer of the earth are always in continuous motion.
Answer
Answer: True
Question 8.
Any conductor can be used to make a lightning conductor.
Answer
Answer: False
Question 9.
An earthquake is a sudden shaking of the earth.
Answer
Answer: True
Question 10.
During earthquake, we should take shelter under a heavy table.
Answer
Answer: True
Question 11.
The waves are recorded by Richter scale.
Answer
Answer: False
Question 12.
A seismograph records waves.
Answer
Answer: True
Question 13.
The outermost layer of the earth is not fragmented.
Answer
Answer: False
Question 14.
An earthquake lasts for a long time.
Answer
Answer: False
Question 15.
A lightning conductor is fixed in the bottom of the building.
Answer
Answer: False
IV. Match the following
| Column I | Column II |
| 1. Earthquake | (a) Loses charge |
| 2. Tsunami | (b) Plastic |
| 3. Electron | (c) Seismograph |
| 4. Thunder | (d) Protects buildings |
| 5. Lightning rod | (e) Power of earthquake |
| 6. Richter scale | (f) Loud sound due to lightning |
| 7. Waves recorder | (g) Negatively charged |
| 8. Copper | (h) Earthquake under sea |
| 9. Bad conductor | (i) Sudden shaking of the earth |
| 10. Discharge | (j) Conductor |
Answer
Answer:
| Column I | Column II |
| 1. Earthquake | (i) Sudden shaking of the earth |
| 2. Tsunami | (h) Earthquake under sea |
| 3. Electron | (g) Negatively charged |
| 4. Thunder | (f) Loud sound due to lightning |
| 5. Lightning rod | (d) Protects buildings |
| 6. Richter scale | (e) Power of earthquake |
| 7. Waves recorder | (c) Seismograph |
| 8. Copper | (j) Conductor |
| 9. Bad conductor | (b) Plastic |
| 10. Discharge | (a) Loses charge |
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