- Movement of tectonic plates: When Earth’s plates collide, slide past, or move away from each other, stress builds up and is released suddenly as an earthquake.
- Volcanic activity: Eruptions can cause earthquakes when magma forces its way through cracks in the crust, creating tremors around the volcano.
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Question
State two natural causes of an earthquake.
Short Answer
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Solution
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Earthquake and its causes
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Chapter 8: Earthquakes - EXERCISES [Page 79]
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RELATED QUESTIONS
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:
About 70 percent of the earthquakes occur in the _________________ Belt.
Name two man-made 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. |
Describe how earthquakes are caused on the surface of the earth.
Is it possible to predict an earthquake? Give reasons to support your answer.
How is the intensity of an earthquake measured?
How an earthquake is caused?
Describe the world’s distribution of earthquakes.
Name the instrument used to record Earthquakes.
Earthquakes occur in the Mid-Atlantic belt.
Answer the following:
A volcanic eruption is one of the main causes of earthquakes.
The magnitude of an earthquake is measured by ______.
Choose the odd one
On an outline map of the world, mark the Pacific Ring of Fire
The earthquake is a ______ activity.
An earthquake of magnitude ______ scale can cause damage from things falling.
