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प्रश्न
Distinguish between the following pair of terms associated with vulcanicity:
Crater and Caldera
उत्तर १
| Crater | Caldera |
| The crater is the mouth of a volcano at the top of the vent with a normal outlet. | Caldera is a very large mouth of a volcano which is quite spacious due to the big amount and thrust of the eruption. |
उत्तर २
Crater and Caldera: Crater forms the summit and Caldera the enlarged mouth or the sunken crater at the center of a volcano. When water accumulates in a crater it forms a crater lake and in a caldera a lake like Taba lake of Sumatra. A crater is formed as a result of the overflow of lava and calera as a result of subsidence.
संबंधित प्रश्न
What do you understand by ‘Vulcanism’?
What is‘magma’?
What is the following:
Mud volcanoes
Match the items given in Column A with the correct ones in Column B.
| Column A | Column B |
| 1. A Rift valley lake | (a) Deccan Trap region of India |
| 2. A horst | (b) Fujiyama |
| 3. A basic lava sheet | (c) Tanganyika |
| 4. Composite cones | (d) Black forest plateau |
| 5. An active volcano | (e) Corndon Hill |
| 6. A Batholith | (f) The Alps |
| 7. A Phaccolith | (g) Upland of Britain is France |
| 8. A young Fold mountain | (h) Stromboli |
Answer the following:
Some volcanoes erupt explosively.
Give reasons for the following:
Earth as a whole does not expand.
How the theory of plate tectonics has explained the formation of mountains like Himalaya or Alps and of the volcanic islands.
______ belt is known as the “Ring of Fire”.
How many major zones of volcanic activities in the world?
The upper part of the earth’s crust ______.
