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प्रश्न
State two ways in which lava may come out of the earth’s crust giving an example of each type of these volcanic activities.
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उत्तर
Two main types of volcanic eruptions are :
- Explosive and
- Quiet or Hawaiian.
- The Explosive eruption is the most violent and destructive Explosion of pent up gases mainly steam cause enormous quantities of magma to be thrown into the air to form great clouds. Example Krakatoa volcano in Sunda Strait in Indonesia erupted in 1883.
- The Quiet eruption cause and other gases to escape. There is no violent explosion. Lava flows the creators and flows down the sides of the cone.
Example: Hawaiian volcano and Mauna Loa.
संबंधित प्रश्न
Explain the types of volcanoes on the basis of periodicity of eruption with examples.
Give one example of volcanic mountains.
Give one example of an active volcano.
Name two types of landforms made by volcanoes. Give an example of each type.
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 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?
Distinguish between :
Seismology and Volcanology.
Distinguish between :
Volcanic Dust and Volcanic Ash.
Describe the materials thrown out during volcanic eruption.
Why is volcanic activity often associated with mountain building ?
What is the following:
‘Ring of Fire’
Give one word for the following :
The funnel shaped hollow at the top of a volcanic cone.
Give one word for the following :
A volcano which has the possibility of erupting in future.
Which type of lavas weather into more fertile soil. Name also one useful feature of volcanicity other than soil fertility.
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 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
Choose the odd one
Distinguish between Active volcano and dormant volcano
How many active volcanoes in the world?
Choose the odd one
Mt. Popa, Mt. Fujiyama, Mt. Kilimanjaro, Mt. Kenya.
