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प्रश्न
Give reasons for the following:
Basic lava cones are broader than Acid lava cones.
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उत्तर १
Basic lava cones are formed by liquid lava which expands and covers a large area while the Acid cones are formed by solid material e.g. ash cinders etc which heap up but do not cover large area and form a high conical hill as compared to broad and low volcanic deposits on the surface.
उत्तर २
Basic lava cones are broader than the Acid lava cones because basic lava is very fluid and flows easily for a great distance before it solidifies whereas acid lava is highly viscous and flows only for a short distance.
संबंधित प्रश्न
Explain the types of volcanoes on the basis of periodicity of eruption with examples.
Fill in the blanks with suitable words:
Volcanic activity is a ______ movement.
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:
The molten rock that reaches the surface of the earth is called ______.
Fill in the blank below:
A lava ___________is made up of basic lava flows solidified away from the vent.
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 effect of volcanic eruption of Karakatoa in 1883.
Describe any three advantages of volcanoes.
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.
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.
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.
What is the following :
Fissure type of volcanoes
What is the following :
Spine or plug
______ Volcano is known as light house of Mediterranean Sea.
Name the three types of volcanoes based on periodicity of eruption.
Distinguish between Active volcano and dormant volcano
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Choose the odd one.
Stromboli, Helens, Hawaii, Fujiyama
Choose the odd one
Mt. Popa, Mt. Fujiyama, Mt. Kilimanjaro, Mt. Kenya.
