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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
What is a volcano?
What is the difference between magma and lava?
Give one example of an active volcano.
What is called the Pacific Ring of Fire? Why is it called so?
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.
Which volcano is known as the ‘lighthouse of the Mediterranean?
Name the three belts where volcanoes are found.
In which belt most of the volcanoes of the world are found?
Why is volcanic activity often associated with mountain building ?
Describe any three advantages of volcanoes.
What is a geyser?
Give two of its main characteristics of Geysers
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 funnel shaped hollow at the top of a volcanic cone.
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 where magma reaches the surface through a vent or a pipe..
Which type of lavas weather into more fertile soil. Name also one useful feature of volcanicity other than soil fertility.
Describe the distribution of volcanoes in the world.
OR
Name the important belts of volcanoes.
What are the influences of volcanoes eruption on man?
OR
What is the importance of volcanoes?
OR
Mention adverse and beneficial effects of volcanoes.
What is the following :
Spine or plug
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
An active volcano, Dormant volcano, Extinct Volcano, Shield volcano
