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प्रश्न
Describe the distribution of volcanoes in the world.
OR
Name the important belts of volcanoes.
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उत्तर
Obviously volcanoes will be found in those regions where the crust of the earth is weak because lava can easily be discharged from such places. These are found in areas of Fold mountains. There are three main belts of volcanoes :
- Circum-Pacific Belt: This belt runs round the Pacific Ocean in Asia and America. It starts from Cape Horn goes along the Andes and the Rockies to Alaska. From there it turns westwards and passing through Aleutian Islands Japan and Formosa goes to Philippine Island. Here one branch goes to East Indies that is Java Sumatra and Bameo and other branch goes to New-Zealand. Some of the well-known Volcanoes are Karakatoa (on a hilly island between Sumatra and Java) Mayon (N. Philippines) Fujiyama (Japan) Chimborezo and Cotopaxi (Equador S. America).
- Mid World Mountain Belts: This belt starts from the West Indies and passing through the Canavy Islands. The Mediterranean sea Caucasus mountains and Turkey reaches the Himalayas. Mt. Vesuvius (Italy) Mt Stromboli (Sicily) Etna (the Mediterranean sea) and Mt. Pelee (West Indies) are the important Volcanoes of this belt.
- African Belts: This belt follows the Great African Rift Valley. This belt running through the Red Sea extends up to Africa. Important Volcanoes are Kilimanjaro Kenya Canary Islands St. Helena (Atlantic ocean).
संबंधित प्रश्न
Give one example of volcanic mountains.
What is a volcano?
Give one example of an active volcano.
What is the difference between a dormant volcano and an extinct volcano?
Name two types of landforms made by volcanoes. Give an example of each type.
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 Circum-Paciflc Belt is also called ____________.
Explain the various parts of a volcano.
Name the largest active volcano in the world.
In which belt most of the volcanoes of the world are found?
Indicate the world distribution of active volcanoes.
Why is volcanic activity often associated with mountain building ?
Describe any three advantages of volcanoes.
Give reasons for the following:
Basic lava cones are broader than Acid lava cones.
Give reasons for the following:
The Circum-Pacific Belt of volcanoes is called ‘The Ring of Fire’.
Answer the following:
Plate margins are zones of great volcanic activity.
Give one word for the following :
The lava which is poor in silica and rich in iron and magnesium.
Which four of the following words are connected with volcanic activity:
Karst, crater, drumlin, stalactite, gully, potholesl, ash, basalt, swallow, holes, dyke, domes, bluffs.
What is the following :
Fissure type of volcanoes
______ Volcano is known as light house of Mediterranean Sea.
Choose the odd one
Give an example of extinct volcano.
Name the three types of volcanoes based on periodicity of eruption.
Choose the odd one.
Stromboli, Helens, Hawaii, Fujiyama
Choose the odd one
An active volcano, Dormant volcano, Extinct Volcano, Shield volcano
Choose the odd one
Mt. Popa, Mt. Fujiyama, Mt. Kilimanjaro, Mt. Kenya.
