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प्रश्न
Describe the materials thrown out during volcanic eruption.
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उत्तर
The materials thrown out of a volcano due to eruptions are of three types :
- Solid materials:- The solid materials include large fragments of rocks known as volcanic Bombs. The finest particles include cinder volcanic ash dust.
- Liquid materials:- The liquid materials include basic lava and Acid lava. Acid lava has more silica while Basic lava has a low content of Silica.
- Gaseous materials:- The gaseous material is mainly composed of steam. The other gases include Oxygen Hydrogen Sulphuric acid Carbon dioxide etc.
संबंधित प्रश्न
Fill in the blanks with suitable words:
Volcanic activity is a ______ movement.
What is a volcano?
Give one example of an active volcano.
Name two types of landforms made by volcanoes. Give an example of each type.
What are known as Shield volcanoes?
Fill in the blank below:
The molten rock that reaches the surface of the earth is called ______.
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.
Give two of its main characteristics of Geysers
State two ways in which lava may come out of the earth’s crust giving an example of each type of these volcanic activities.
Differentiate between active dormant and extinct volcanoes.
Give reasons for the following:
Basic lava cones are broader than Acid lava cones.
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 large sill of acid lava which has solidified gradually giving a dome-like shape.
Give one word for the following :
A volcano whose eruption buried and destroyed two Roman towns.
Describe the distribution of volcanoes in the world.
OR
Name the important belts of volcanoes.
What is the following :
Fissure type of volcanoes
What is the following :
Epicentre
An example for active volcano is ______.
Give an example of extinct volcano.
Name the three types of volcanoes based on periodicity of eruption.
Distinguish between Active volcano and dormant volcano
Describe the classification of volcanoes based on the eruptions.
Choose the odd one.
Stromboli, Helens, Hawaii, Fujiyama
