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Question
Distinguish between the following pairs of terms associated with vulcanicity:
Magma and Lava
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Solution
Magma and Lava :
Magma :
- Magma is hot sticky molten material.
- It contains solutions to water and gases.
- It comes out during volcanic eruptions.
Lava :
- Lava is solidified magma.
- Gases and water disappear after evaporataion.
- It cools down as it comes into contact with the atmosphere.
RELATED QUESTIONS
What is the magma chamber of a volcano?
What is the following:
Caldera
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:
Hot springs are common in volcanic regions.
Give reasons for the following:
Earth as a whole does not expand.
Out of the following words write down the four that are connected with volcanic activity.
Karst, crater, drumlin, stalactites, gully, pot holes, ash, basalt, swallow holes, dyke, domes, bluffs.
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”.
Choose the odd one
Vesuvius, Stromboli, St.Helena, Etna.
