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Monsoon phenomena and its mechanism - class-IX

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Deforestation results in which of the following?

  1. Drought

  2. Floods

  3. Soil erosion

  4. All of these


Correct Option: D
Explanation:

Forests naturally absorb water from rainfall and slowly release the water into the rivers. After deforestation, rainfall flows too quickly to the rivers, stripping the topsoil and causing erosion and flooding to occur. When these floods break the river's banks, further problems arise as the path of the river changes and further soil erosion occurs along the river's new path. Deforestation also makes an area more arid, contributing to droughts.

A flash flood is a flood that ________.

  1. Is caused by heavy flooding of a river

  2. Occurs in urban areas

  3. Occurs suddenly and unexpectedly and for a short duration

  4. Is caused by the blocking of drains


Correct Option: C
Explanation:

Flash floods are defined by the speed of flooding, not the source or location of flooding. While flash floods are often caused by heavy rainfall, they can also result from other events, such as drain blockages and cloud bursts

An overflow of water that submerges land is _________.

  1. Drought

  2. Flood

  3. Avalanche

  4. All of these


Correct Option: B
Explanation:

A flood is an overflow of water that submerges land which is usually dry. The European Union (EU) Floods Directive defines a flood as a covering by water of land not normally covered by water. In the sense of "flowing water", the word may also be applied to the inflow of the tide.

The reason for the formation of cyclones in the Bay of Bengal is _________.

  1. It is a part of Indian Ocean

  2. Monsoon winds

  3. It is subjects to intense heating since it is surrounded by water on three sides

  4. Winter monsoons blow over from land


Correct Option: A

The cyclone occurs where there is _______________.

  1. Violent movement of air currents

  2. Low pressure at the centre and high pressure all round it

  3. High pressure in the centre and low pressure all round it

  4. Flow of winds from the tropics to the poles


Correct Option: B

Which one of the following places is unlikely to be affected by a cyclone? 

  1. Chennai

  2. Mangalore

  3. Amritsar

  4. Puri


Correct Option: C
Explanation:

Amritsar is least likely to be affected by a cyclone because the city does not lie near to any coastal area. In India the cyclones generally affect the coastal areas.

By what measures can we significantly reduce the impact of cyclones on the people?

  1. Better planning

  2. Preparedness awareness

  3. Mitigation measures

  4. All the above


Correct Option: D
Explanation:

Prior planning will help the effects of the storm to be less, reduce potential loss of life and property, and help you to recover faster.

  1. Preparedness is a continuous cycle of planning, organizing, training, equipping, exercising, evaluating, and taking corrective action. Training and exercising plans is the cornerstone of preparedness which focuses on readiness to respond to all-hazards incidents and emergencies.
  2. Mitigation is the effort to reduce loss of life and property by lessening the impact of disasters and emergencies. Mitigation involves structural and non-structural measures taken to limit the impact of disasters and emergencies.

What are the three phases of disaster management planning?

  1. Preparation, Planning and Perception

  2. Evacuating, Rebuilding and Re-branding

  3. Planning, Evacuating and Recovery

  4. Preparation, Response and Recovery


Correct Option: D
Explanation:

The three phases of disaster management include:

  1. Preparedness 
  2. Response 
  3. Recovery

Willy willy is ___________.

  1. A type of tree grown in temperature regions

  2. A wind that blows in a desert

  3. A tropical cyclone of north-west Australia

  4. A kind of common fish found near lakshdweep Islands


Correct Option: C

Which of the following places is likely to get affected by a cyclone?

  1. Delhi

  2. Jaipur

  3. Amritsar

  4. Puri


Correct Option: D
Explanation:

Cyclone usually occurred to the place which are near to the coastal region. Since, Puri is the place among all the option which is situated at coastal region.

How much land area in India is prone to floods?

  1. $10$ million hectare

  2. $15$ million hectare

  3. $20$ million hectare

  4. $24$ million hectare


Correct Option: C
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