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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
Explain the types of volcanoes on the basis of periodicity of eruption with examples.
Give one example of volcanic mountains.
Fill in the blanks with suitable words:
Volcanic activity is a ______ movement.
What is called the Pacific Ring of Fire? Why is it called so?
The forces arising from the interior of the earth:
Fill in the blank below:
The Circum-Paciflc Belt is also called ____________.
Explain the various parts of a volcano.
Name the three belts where volcanoes are found.
Indicate the world distribution of active volcanoes.
Distinguish between :
Seismology and Volcanology.
Describe the effect of volcanic eruption of Karakatoa in 1883.
What is a geyser?
Name a well known 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.
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 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.
Which four of the following words are connected with volcanic activity:
Karst, crater, drumlin, stalactite, gully, potholesl, ash, basalt, swallow, holes, dyke, domes, bluffs.
Choose the odd one
Give an example of extinct volcano.
Describe the classification of volcanoes based on the eruptions.
Choose the odd one
An active volcano, Dormant volcano, Extinct Volcano, Shield volcano
