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प्रश्न
“Our earth is a playfield for two opposing groups of geomorphic processes.” Discuss.
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उत्तर
It is absolutely right to say that our earth is playfield for two opposing groups of forces. These forces are exogenic and endogenic. The external forces are known as exogenic forces and the internal forces are known as endogenic forces. The differences in the internal forces operating from within the earth which built up the crust have been responsible for the variations in the outer surface of the crust. The earth’s surface is being continuously subjected to external forces induced basically by energy (sunlight). Of course, the internal forces are still active though with different intensities. That means, the earth’s surface is being continuously subjected to by external forces originating within the earth’s atmosphere and by internal forces from within the earth.
The actions of exogenic forces result in wearing down (degradation) of relief/elevations and filling up (aggradation) of basins/depressions, on the earth’s surface. The endogenic forces continuously elevate or build up parts of the earth’s surface and hence the exogenic processes fail to even out the relief variations of the surface of the earth. So, variations remain as long as the opposing actions of exogenic and endogenic forces continue. In general terms, the endogenic forces are mainly land building forces and the exogenic processes are mainly land wearing forces.
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संबंधित प्रश्न
The movement of tectonic plates is induced by ______ energy.
The point of origin of an earthquake is called the _________.
What are seismic waves?
Write about the Pacific Ring of fire.
Distinguish between primary waves and secondary waves.
Distinguish between Shield volcano and volcanic Dome.
Write a note on the internal and external processes of Earth.
Explain the effects of Volcanoes.
On the given outline map of the world, mark the following:
Pacific Ring of fire
The movement of tectonic plates is due to ______ energy from the mantle.
In ______ boundary, the plates slide horizontally past each other.
The collision with the Eurasian Plate along the boundary between India and Nepal formed ______ Plateau.
The upper layer of the earth’s mantle below the lithosphere is called ______.
Earthquake is the shaking or trembling of the Earth’s ______.
Match the following:
| (a) | Focus | (i) | L-Waves |
| (b) | Surface Waves | (ii) | S-Waves |
| (c) | Seismometer | (iii) | P-Waves |
| (d) | Secondary Waves | (iv) | Hypocenter |
| (e) | Primary Waves | (v) | Instrument |
Match the following:
| (a) | Active Volcano | (i) | Mt. Kilimanjaro |
| (b) | Dormant Volcano | (ii) | Strata Volcano |
| (c) | Extinct Volcano | (iii) | Mt. St. Helens |
| (d) | Composite Volcano | (iv) | Mt. Fuji |
| (e) | Shield Volcano | (v) | Mauma loa |
Give reason for the following:
The Himalayas are fold mountains
What is the difference between the ‘magnitude’ and the ‘intensity’ of an earthquake?
What is Tsunami Warning System (TWS)?
Pacific Ring of Fire – What do you understand by the term?
These waves are the fastest of all the Earthquake waves.
Consider the given statement
- The plates move vertically in convergent Boundary.
- The plates pull away from each other in the Transform boundary.
- The plates slide horizontally past each other in Transform Boundary.
Give reason for the following.
Why does the lava flow out in all directions in the shield volcano?
Distinguish between:
Seismology and Geology.
Give an account tsunami.
