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प्रश्न
What are the influences of volcanoes eruption on man?
OR
What is the importance of volcanoes?
OR
Mention adverse and beneficial effects of volcanoes.
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उत्तर
Adverse effects of volcanoes
- Most of the recently formed volcanic areas are barren and forbidding to man.
- The sudden flow of basic lava from an eruptive volcano may cause the total destruction of human life property and crops in the neighbouring areas.
- The Karakatoa volcanic eruption (in 1883) caused such high sea waves that Karakatoa and several other neighbouring islands were completely destroyed.
- Volcanoes eruption of Vesuvius in 79 A.D. buried and destroyed completely the two Roman towns of Pompeii and Herculaneum.
Beneficial effects of Volcanoes :
- The soil made up of lava is very fertile.
- Lakes are formed when the craters are filled up with waters.
- Several minerals which are found deep down come up near the surface of the earth.
- Lava flows have preserved many fossils which throw much light on the past life.
संबंधित प्रश्न
Give one example of volcanic mountains.
What is a volcano?
What is the difference between magma and lava?
How are hot springs formed?
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.
Fill in the blank below:
The Circum-Paciflc Belt is also called ____________.
Name the three belts where volcanoes are found.
Describe the materials thrown out during volcanic eruption.
What is a geyser?
Give two of its main characteristics of Geysers
Differentiate between active dormant and extinct volcanoes.
Answer the following:
Plate margins are zones of great volcanic activity.
Give one word for the following :
The funnel shaped hollow at the top of a volcanic cone.
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 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..
Describe the distribution of volcanoes in the world.
OR
Name the important belts of volcanoes.
What is the following :
Spine or plug
What is the following :
Epicentre
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
An active volcano, Dormant volcano, Extinct Volcano, Shield volcano
