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प्रश्न
Name the causes of earthquakes.
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उत्तर
- Volcanic eruptions
- Faulting
- Elasticity of rocks
- Local causes
- Apeiron, Genetic events.
संबंधित प्रश्न
For the formation of a rift valley, which of the following processes should occur in the earth’s crust?
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:
The last of the earthquake waves to arrive on the surface of the earth are ___________ waves.
Fill in the blank:
The giant sea waves caused by earthquakes in the oceans are called ___________.
What is known as the Richter scale?
How are earthquakes useful?
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. |
How is the intensity of an earthquake measured?
Describe the world’s distribution of earthquakes.
Give one word for the following :
The surface position immediately above the origin of an earthquake.
Give reasons for the following:
Internal processes are different from external processes.
The magnitude of an earthquake is measured by ______.
The earthquake waves are recorded by an instrument known as ______.
Choose the odd one
On an outline map of the world, mark the Pacific Ring of Fire
The earthquake is measured by the ______ scale.
Name the point where the vibrations originate in an earthquake.
