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प्रश्न
Distinguish between the following pair of terms associated with vulcanicity:
Acidic Lava and Basic Lava
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उत्तर १
| Acidic Lava | Basic Lava |
| It is rich in silica and poor in iron and magnesium. | It is poor in silica and rich in iron and magnesium. |
उत्तर २
Acidic Lava and Basic lava
Acidic Lava :
- It is a highly viscous lava.
- It is light coloured like granite.
- It has a low density.
- It has a high percentage of silica.
- It flows slowly and results in steep-sided cones or lava domes.
Basic Lava :
- It is highly fine and thin.
- It is dark coloured like Basalt.
- It has a high density.
- It is poor in silica.
- It flows rapidly as thin sheets resulting in shield cones.
संबंधित प्रश्न
How are volcanoes formed?
What is‘magma’?
What is the following:
Fissure type of volcanoes
What is the following:
Caldera
Distinguish between the following pair of terms associated with vulcanicity:
Cinder Cone and Composite Cone
Distinguish between the following pairs of terms associated with the crustal movement of the earth:
Tilted Block mountains and Lifted Block mountains
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.
Answer the following:
Earthquakes are common in the belt of young fold mountains.
Give reasons for the following:
Earth as a whole does not expand.
