Rachna Sapra solutions for जिओग्राफी [अंग्रेजी] कक्षा ९ आईसीएसई chapter 8 - Volcanoes [Latest edition]

Which among the following is not a reason for eruption of volcanoes?

What does the term ‘fault in the crust’ mean?

The ______ inside the crust supplies the magma for the volcanic eruption.

Dormant volcanoes are more dangerous than active volcanoes. This is because ______.

Barren island, the only active volcano of India is located in the ______.

The scientists who study volcanoes are called the ______.

Intrusive landforms are formed inside the earth when the magma solidifies in different shapes. These are ______.

The intrusive landform in the shape of a saucer is called ______.

Which of the following is an extrusive landform?

Volcanoes happen to affect the groundwater as well. Which of the following is not an example of association of volcano and groundwater?

Extrusive landforms are formed when the lava cools down after coming out on the surface of the earth. Lava is made up ______.

Which of the following countries is known to have large number of geysers?

Which of the following oceans experience maximum volcanic eruptions?

Which of the following does not belong to the Alpine-Himalayan belt?

Hot springs and geysers are rare phenomenon. However, in few countries, their hot water is used to heat up the buildings. This statement holds true for which of the following countries?

Assertion (A): Volcanoes usually erupt at the fault lines.

Reason (R): Faults provide the gap to the gases and magma to escape out.

Assertion (A): Extinct volcanoes have not shown any activity for a long historic period.

Reason (R): The vent of these volcanoes have got closed with a plug.

Assertion (A): Volcanoes act as natural safety valves.

Reason (R): Volcanoes help in releasing the intense pressure which builds up inside the earth.

Assertion (A): Mid oceanic ridge has not shown any volcanic active in recent past.

Reason (R): Mid oceanic ridge runs through the centre of five oceans.

Assertion (A): Intrusive type of landforms are built when magma cools down inside the Earth.

Reason (R): The intrusive landforms get exposed when the layer of overlying rocks gets eroded.

Read the given passage and answer the following questions.

1. Why does the temperature inside the earth increase with increasing depth?
2. Establish the correlation between hot interior of the earth and the phenomena of volcanoes.
3. What role do the tectonic plate boundaries play in the phenomena of volcanoes?
4. Do you think the volcanoes would have erupted if there were no plate boundaries? What would have been the consequences of that?

Name four types of intrusive landforms.

Mention two constructive effects of the volcano.

Write any three destructive effects of volcanoes.

Name the three main volcanic regions of the world.

What is a geyser?

Name the country where the maximum number of geysers are found.

Mention the two places in India where geothermal energy is being used to produce electricity.

Define laccoliths.

What are hot springs?

What gives the typical smell to hot spring waters?

What is the difference between magma and lava?

What is the magma chamber of a volcano?

What is the difference between a fissure of volcano and crater of a volcano?

What do you mean by a cinder cone?

What is sills?

What is dykes?

Give an example of a crater lake.

Classify the volcanoes based on their frequency of eruptions.

Give one example of an active volcano.

Give an example of extinct volcano.

Give one example of a dormant volcano.

Give an example of volcanic plains.

What do you understand by composite cones?

What is a caldera?

How is caldera different from a crater?

Mention the two types of extrusive landforms made by volcanoes.

What do you understand by the term phacoliths?

What does the term batholith signify?

What is called the Pacific Ring of Fire? Why is it called so?

What is a bubbling mud pool?

Explain the formation of a volcanic plateau.

Give a geographical reason for the following:

Hot springs have medicinal properties to cure skin diseases.

Give a geographical reason for the following:

Earthquakes are closely associated with volcanic belts.

Explain the following term:

Lava

Explain the following term:

Lapolith

Explain the following term:

Caldera

Explain the following term:

Crater