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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
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.
Give reasons why an earthquake occurs.
Fill in the blank:
Most earthquakes occur on account of the strain in the _________.
Fill in the blank:
___________ are the first earthquake waves to be recorded on a seismograph of an earthquake.
What is called an earthquake?
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. |
Describe how earthquakes are caused on the surface of the earth.
Explain the three types of earthquake waves.
Name some Earthquakes which caused great damage.
Describe the main type of Earthquake Waves.
Answer the following:
A volcanic eruption is one of the main causes of earthquakes.
The earthquake waves are recorded by an instrument known as ______.
How the earthquake can be recorded?
Give a note on Tsunami 2004.
What is the point of the earth’s surface directly above the focus called?
