Advertisements
Advertisements
प्रश्न
Describe the distribution of volcanoes in the world.
OR
Name the important belts of volcanoes.
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).
APPEARS IN
संबंधित प्रश्न
Give one example of volcanic mountains.
What is a volcano?
What is the difference between magma and lava?
Name the three types of volcanoes on the basis of the frequency of their eruption.
What are known as Shield volcanoes?
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:
A lava ___________is made up of basic lava flows solidified away from the vent.
Fill in the blank below:
The Circum-Paciflc Belt is also called ____________.
Explain the various parts of a volcano.
In which belt most of the volcanoes of the world are found?
Indicate the world distribution of active volcanoes.
Distinguish between :
Volcanic Dust and Volcanic Ash.
Describe the materials thrown out during volcanic eruption.
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.
Name a well known geyser.
Differentiate between active dormant and extinct volcanoes.
Give reasons for the following:
The Circum-Pacific Belt of volcanoes is called ‘The Ring of Fire’.
Give one word for the following :
A volcano which has the possibility of erupting in future.
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 :
Epicentre
______ Volcano is known as light house of Mediterranean Sea.
