• Some Natural Phenomena
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Some Natural Phenomena

Description: Physics, Science, Some Natural Phenomenon, Lightening, Protection from Lightening, Earthquakes
Number of Questions: 15
Created by:
Tags: Science Lightning, Lightning Safety, Earthquake, Cause and Protection Against Earthquake. Some Natural Phenomena
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Which of the following is used to measure the destructive energy of an earthquake?

  1. Vernier Caliper

  2. Richter scale

  3. Barometer

  4. Actinometer

  5. Doppler radar

Show answer
Correct Option: B
Explanation:

It measures the destructive energy of an earthquake.

Which of the following devices is used to test if an object is carrying a charge or not?

  1. Lightning conductor

  2. Metal conductor

  3. Electroscope

  4. Frequency counter

  5. Thermometer

Show answer
Correct Option: C
Explanation:

It is the device that can test if an object is carrying charge or not.

_______________________ discovered that there is an electric discharge between clouds that produces a spark, and it is the electric spark between the clouds and the earth that appears as lightning.

  1. George Washington

  2. Issac Newton

  3. Thomas Alva Edison

  4. Thomas Jefferson

  5. Benjamin Franklin

Show answer
Correct Option: E
Explanation:

Benjamin Franklin discovered that there is an electric discharge between clouds that produces a spark, and it is the electric spark between the clouds and the earth that appears as lightning. His famous kite experiment led him to this discovery.

Which of the following reasons is/are valid for thunderstorms usually occurring in summer? (a) Thunderstorms are usually caused by the intense heating of ground surfaces during summer. (b) The charges discharged to the ground as lightening, cause heating of air that is in their path. (c) The heated air contracts rapidly, creating shock waves that can be heard as the rumble of thunder.

  1. Only a

  2. Only b

  3. Only c

  4. Only a and b

  5. All of the above

Show answer
Correct Option: D
Explanation:

Thunderstorms are usually caused by the intense heating of ground surfaces during summer. The charges discharged to the ground as lightning, cause heating of air that is in their path. Both these statements are correct.

Which of the following can be charged easily by friction? (a) Plastic scale (b) Copper rod (c) Inflated balloon (d) Plastic straw

  1. Only a and b

  2. Only a and c

  3. Only a, b and c

  4. Only a, c and d

  5. Only a and d

Show answer
Correct Option: D
Explanation:

A plastic scale and an inflated balloon can be charged by friction. A plastic straw can also be charged by friction. Thus, this is a correct answer.

Which of the following is the name given to the boundaries of the earth's plates where earthquakes tend to occur?

  1. Tectonic plates

  2. Epicentre

  3. Hypocentre

  4. Fault zones

  5. Focal depth

Show answer
Correct Option: D
Explanation:

Fault zones are the boundaries of the earth's plates where earthquakes tend to occur.

The lightning occurs because of the charges in the clouds. Which of the following statements is incorrect about how these positive and negative charges are created in the clouds?

  1. Bigger water droplets acquire the positive charges in them.

  2. Positively charged droplets move to the upper regions.

  3. A small region of positive charge is also created near the lower parts of the clouds.

  4. Opposite charges in clouds exert a very strong force of attraction between them.

  5. Air between clouds prevents the charges from coming too close.

Show answer
Correct Option: A
Explanation:

This statement is incorrect. The smaller water droplets acquire the positive charges and the bigger droplets acquire the negative charges.

The process of transfer of charge into the ground can be done. The electrical charge can be transferred from a charged object to another. This process is called ___________ and a device called _________ is used to pass this charge.

  1. static, electroscope

  2. grounding, electroscope

  3. earthing, electroscope

  4. earthing, metal conductor

  5. earthing, lightning conductor

Show answer
Correct Option: D
Explanation:

Earthing is the process through which an electric charge is passed from an object to the ground. This charge is passed through by a device called metal conductor. 

Which of the following reasons is not valid for causing tremors on the earth?

  1. Volcanic eruptions

  2. Meteor hit

  3. Underground nuclear explosion

  4. Movement of earth's plates

  5. Being hit by lightning

Show answer
Correct Option: E
Explanation:

The earth's crust will not feel tremors upon being hit by lightning. Where ever lightning falls will burn or get damaged,  but it will not cause tremors or aftershocks.

Which of the following is not a correct explanation for the mantle?

  1. It extends to a depth of 2800 km below the crust.

  2. It is the central region between the core and the crust.

  3. The pressure inside it increases according to the depth.

  4. Its outer layer is of molten iron and nickel.

  5. All of the above

Show answer
Correct Option: D
Explanation:

 This statement is not about the mantle. It describes the outer core of the innermost part of the earth.

Which of the following is the correct explanation for a tsunami?

  1. It occurs along the edges of the tectonic plates.

  2. It is caused by earthquakes or volcanic activity occurring under the ocean.

  3. It is the tremor that produces waves on the surface of the earth.

  4. It is the vertical distance between the hypocentre and the epicentre.

  5. It generates seismic waves.

Show answer
Correct Option: B
Explanation:

A tsunami is caused by earthquakes or volcanic activity occurring under the ocean.

What device is used to protect building from lightning?

  1. Crescograph

  2. Anemometer

  3. Lightning conductor

  4. Barometer

  5. Thermometer

Show answer
Correct Option: C
Explanation:

Lightning conductor protects the building from the damage of lightning.

Which of the following measures can be taken to protect our property during earthquakes? (a) Securing items that might fall. (b) Repairing of deep cracks in the foundations or ceilings. (c) Taking shelter in a car instead of under a tree or on an open field. (d) Installing strong latches on cabinets.

  1. Only a, b and c

  2. Only a, b and d

  3. Only a, c and d

  4. Only b, c and d

  5. All of the above

Show answer
Correct Option: B
Explanation:

This is the correct option. All these statements are excellent ways of protecting our property from damage during an earthquake.

The following options list some places in India that are classified in the Highest Risk Zone or the Zone 5 for earthquakes. Which of these does not belong to this group?

  1. Kashmir

  2. Western and Central Himalayas

  3. Indo-Gangetic basin

  4. North east Indian region

  5. Rann of Kutch

Show answer
Correct Option: C
Explanation:

This is the correct option. This belongs to the Zone 4 or the Damage Risk Zone.

Which of the following objects will be able to attract pieces of paper from a flat surface after being rubbed with the materials given adjacent to them?

Objects Materials used for rubbing
a. Wooden scale Polythene
b. Plastic fork Flannel cloth
c. Steel spoon Woollen cloth
d. Glass rod Silk cloth

  1. Both a and b

  2. Both a and c

  3. Both b and c

  4. Both b and d

  5. Both a and d

Show answer
Correct Option: D
Explanation:

 Both the plastic fork and the glass rod will get charged upon rubbing with the flannel and silk cloth. Thus, they will be able to attract the pieces of paper.

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