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Question
Distinguish between the following pair of terms associated with vulcanicity:
Crater and Caldera
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Solution 1
| 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. |
Solution 2
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.
RELATED QUESTIONS
What do you understand by ‘Crater of the Volcano’?
What is the following:
Caldera
Distinguish between the following pair of terms associated with vulcanicity:
Geysers and Hot Springs
Distinguish between the following pairs of terms associated with the crustal movement of the earth:
Graben and Horst
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
The vent of a volcano when blocked results in an explosive eruption.
Give reasons for the following:
Earth’s movements have modified the Earth’s surface.
Give reasons for the following:
Earth as a whole does not expand.
Assertion (A): The Pacific Ocean includes two thirds of the world’s volcanoes.
Reason (R): The boundary along the Eastern and Western coast areas of the Pacific Ocean is known as the Pacific Ring of Fire.
Choose the odd one
Vesuvius, Stromboli, St.Helena, Etna.
