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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 the difference between magma and lava?
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.
What is called the Pacific Ring of Fire? Why is it called so?
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. |
The forces arising from the interior of the earth:
Fill in the blank below:
A lava ___________is made up of basic lava flows solidified away from the vent.
Name the three belts where volcanoes are found.
Distinguish between :
Seismology and Volcanology.
What is a geyser?
State two ways in which lava may come out of the earth’s crust giving an example of each type of these volcanic activities.
What is the following:
‘Ring of Fire’
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 :
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.
Which type of lavas weather into more fertile soil. Name also one useful feature of volcanicity other than soil fertility.
What is the following :
Spine or plug
An example for active volcano is ______.
Choose the odd one
Name the three types of volcanoes based on periodicity of eruption.
Distinguish between Active volcano and dormant volcano
Choose the odd one.
Stromboli, Helens, Hawaii, Fujiyama
Choose the odd one
An active volcano, Dormant volcano, Extinct Volcano, Shield volcano
