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प्रश्न
Explain the various parts of a volcano.
उत्तर
A volcano represents some typical parts e.g. the molten rock or magma mostly lava makes the conical body of a volcano. Magma chamber is the source of erupting magma. Vent is the main channel through which the magma erupts outwards. Crater is the mouth or uppermost part of a volcano which is a big hole from which magma erupts and spreads all over.
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संबंधित प्रश्न
Explain the types of volcanoes on the basis of periodicity of eruption with examples.
Give one example of volcanic mountains.
What is a volcano?
What is the difference between dormant volcano and an extinct volcano?
What is called the Pacific Ring of Fire? Why is it called so?
How are hot springs formed?
Match the Following:
| Column A | Column B |
| 1. Vent | (a) An active volcano |
| 2. Extinct | (b) Hot water fountain |
| 3. Geyser | (c) Dead Volcano |
| 4. Mt. Stromboli | (d) An opening in the earth's crust through which lava flows. |
| 5. Cinder Cone | (e) A volcanic landform. |
Fill in the blank below:
The forces arising from the interior of the earth are called _________ forces
Fill in the blank below:
The molten rock that reaches the surface of the earth is called ______.
Name the three belts where volcanoes are found.
Distinguish between :
Seismology and Volcanology.
Describe the effect of volcanic eruption of Karakatoa in 1883.
Why is volcanic activity often associated with mountain building ?
Describe any three advantages of volcanoes.
Differentiate between active dormant and extinct volcanoes.
Give reasons for the following:
Basic lava cones are broader than Acid lava cones.
Answer the following:
Plate margins are zones of great volcanic activity.
Give one word for the following :
The funnel shaped hollow at the top of a volcanic cone.
Give one word for the following :
The lava which is poor in silica and rich in iron and magnesium.
Give one word for the following :
A volcano which has the possibility of erupting in future.
Give one word for the following :
A volcano where magma reaches the surface through a vent or a pipe..
Give one word for the following :
A volcano whose eruption buried and destroyed two Roman towns.
What is the following :
Fissure type of volcanoes
What is the following :
Epicentre
Describe the classification of volcanoes based on the eruptions.
How many active volcanoes in the world?
Choose the odd one
An active volcano, Dormant volcano, Extinct Volcano, Shield volcano
