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प्रश्न
What is an Earthquake?
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उत्तर १
The sudden mild or violent shaking of a part of the earth is called an earthquake. An earthquake is generally accompanied by a rumbling and tremors.
उत्तर २
An earthquake is tremor or convulsion of the earth’s crust due to sudden movement of the crust.
संबंधित प्रश्न
Identify and name the internal movement.
Molten magma is thrown out of the earth’s mantle.
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:
Most earthquakes occur on account of the strain in the _________.
Fill in the blank:
About 70 percent of the earthquakes occur in the _________________ Belt.
What is called an earthquake?
State two natural causes 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. |
Explain the three types of earthquake waves.
Name the instrument used to record Earthquakes.
Earthquakes occur in the Mid-Atlantic belt.
What was the cause of the Koyna earthquake in India?
Describe the main type of Earthquake Waves.
Why are earthquakes related to volcanoes?
Give one word for the following :
The surface position immediately above the origin of an earthquake.
Choose the odd one
Define Earthquake.
The earthquake is measured by the ______ scale.
How the earthquake can be recorded?
What is the point of the earth’s surface directly above the focus called?
