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Question
Define Earthquake.
Solution
A sudden movement of a portion of the earth’s crust which produces a shaking or trembling is known as an earthquake.
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RELATED QUESTIONS
Arrange the following statements in chronological order in which an earthquake occurs.
- The earth’s surface vibrates.
- The plates suddenly move.
- Due to the movements in the mantle, compression goes on increasing.
- Along the weak points ( faultlines) rocks break apart.
- Stored energy is released in the form of seismic waves.
Fill in the blank:
___________ are the first earthquake waves to be recorded on a seismograph of an earthquake.
Fill in the blank:
The last of the earthquake waves to arrive on the surface of the earth are ___________ waves.
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About 70 percent of the earthquakes occur in the _________________ Belt.
Name one man-made cause of an earthquake.
Match the Columns.
| Column A | Column B |
| 1. Tsunami | (a) The waves that make the inhabitants feel the ground motion. |
| 2. Seismograph | (b) The instrument for measuring the intensity of earthquakes. |
| 3. S-waves | (c) Harbour waves generated by oceanic earthquakes. |
| 4. Richter scale | (d) The point on the earth surface directly above the seismic focus. |
| 5. Epicentre | (e) An instrument for recording the movement of earthquake waves. |
Is it possible to predict an earthquake? Give reasons to support your answer.
How are earthquakes distributed over the globe?
How an earthquake is caused?
Name some Earthquakes which caused great damage.
What was the cause of the Koyna earthquake in India?
Name three causes of Earthquakes.
Answer the following:
A volcanic eruption is one of the main causes of earthquakes.
The magnitude of an earthquake is measured by ______.
The earthquake waves are recorded by an instrument known as ______.
Seismology is the study of ______.
On an outline map of the world, mark the Pacific Ring of Fire
The earthquake is a ______ activity.
