Name: Earthquake: Causes, Magnitude and Its Measurement
Uploaded: 2019-07-19
Duration: 5 min 17 s
Description: We all have surely learnt about earthquakes, usually through the media. Let us discuss the causes and magnitude scales, and learn how a seismograph measures them.

Question

Solve the following crossword puzzle with the help of the clues given below.

Across
2. Unlike charges ____ each other.
4. The origin of an earthquake
7. The point on the Earth's surface directly above the origin of the earthquake
8. The magnitude of an earthquake is measured in ____ scale.
9. The process of connecting a charged body to the Earth
10. Sudden shake on the surface of the Earth

Down
1. A material that allows the flow of charges through it
3. In the process of charging by ____, the uncharged body acquires the same kind of charge.
5. Like charges ____ each other.
6. Device used to measure the intensity of an earthquake.

Accepted Answer

The completed crossword puzzle is shown below.

A material that allows the flow of charges through it, is called a conductor. In the process of charging by conduction, the uncharged body acquires the same kind of charge. The unlike charges attract each other whereas like charges repeal each other. The process of connecting a charged body to the Earth is known as earthing.

A sudden shake on the surface of the Earth is called an earthquake. The instrument which measures and records the magnitude of an earthquake in terms of the shock waves it produces is the seismograph. It consists of a mass attached to a fixed base. The scale used to measure the intensity of an earthquake is the Richter scale. It is also a particular type of seismometer. The point inside the Earth where the earthquake originates is called the focus of the quake. The point on the surface of the Earth vertically from the focus of the earthquake is called the epicentre. The effect of a quake is most at the epicentre of the quake.

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