- 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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प्रश्न
State two natural causes of an earthquake.
लघु उत्तरीय
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उत्तर
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Earthquake and its causes
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 8: Earthquakes - EXERCISES [पृष्ठ ७९]
APPEARS IN
संबंधित प्रश्न
Give a geographical reason.
Buildings collapsed at the foothills of the Himalayas because of an earthquake. Before collapsing, they were moving forward and backward.
Give reasons why an earthquake occurs.
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.
Name two man-made causes of an earthquake.
What are known as seismic focus and epicenter with respect to 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.
How is the intensity of an earthquake measured?
Name the instrument used to record Earthquakes.
Name some Earthquakes which caused great damage.
Name the causes of earthquakes.
Name three causes of Earthquakes.
Choose the odd one
Define Earthquake.
On an outline map of the world, mark the Pacific Ring of Fire
An earthquake of magnitude ______ scale can cause damage from things falling.
Choose the odd one.
focus, epicenter, vent, seismic waves
