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Which of the following is wrongly matched? (a) Rainfall caused by mountain standing in the way of moisture-laden winds Relief rainfall (b) Rain caused by the vertical circulation of air currents Orographic rainfall (c) Rain caused by a warm moist air mass moving upward over cold air mass Cyclonic rain-fall (d) An area sheltered from rain-bearing winds by a hill. Rain-shadow area

Which of the following is wrongly matched? (a) Rainfall caused by mountain standing in the way of moisture-laden winds Relief rainfall (b) Rain caused by the vertical circulation of air currents Orographic rainfall (c) Rain caused by a warm moist air mass moving upward over cold air mass Cyclonic rain-fall (d) An area sheltered from rain-bearing winds by a hill. Rain-shadow area Correct Answer b

  • The term orographic and relief rainfall are the same.
  • The convectional rainfall is caused by the vertical movement of air mass.

 

Types of Rainfall

Rainfall can be classified into three types:

1. Convectional Rainfall

2. Orographic Rainfall

3. Cyclonic or Frontal Rainfall

Convectional Rainfall

  • The air on being heated becomes light and rises in convection currents because of insolation.
  • As it rises, it expands and loses heat and consequently, condensation takes place.
  • Thick dark and extensive cumulo-nimbus clouds are formed.
  • Heavy rainfall occurs for a shorter time with a thunderstorm and lightning.
  • It is very common in the equatorial regions and interior parts of the continents, particularly in the northern hemisphere.

 

Orographic Rainfall

  • When the saturated air mass comes across a mountain, it is forced to ascend and as it rises, it expands.
  • The temperature falls and the moisture is condensed.
  • The windward (slope of the mountain facing the wind )slopes receive greater rainfall and leeward slopes remain rainless and dry.

 

Cyclonic Rainfall/ frontal rainfall

  • When two large mass of air currents having unequal densities and temperature came into contact, the rising warm moist air mass reaches above the colder one.
  • The rising warm moist air condenses to form clouds and then causes heavy rainfall.
  • Such rainfall associated with thunder and lightning is also called as the frontal rainfall.

Related Questions

Which of the following are reasons for the chief fishing grounds being located in continental shelf areas where cold and warm currents meet? I. Warm currents are rich in phosphates and nitrates II. Plankton - the chief fish feed - thrives in these regions III. The meeting of cold and warm currents allows the water to be well aerated IV. The epicontinental seas allow sunlight to reach almost to the bottom
Which of the following are reasons for the chief fishing grounds being located in continental shelf areas where cold and warm currents meet?
I. Warm currents are rich in phosphates and nitrates
II. Plankton - the chief fish feed - thrives in these regions
III. The meeting of cold and warm currents allows the water to be well aerated
IV. The epicontinental seas allow sunlight to reach almost to the bottom
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Which one of the following pairs of properties of typical air masses is correct? Air Mass Source Region A. Maritime Equatorial Warm oceans in the equatorial zone B. Maritime Polar Warm oceans in the tropical zone C. Continental Tropical Less warm oceans in the tropical zone D. Continental Polar Moist oceans in the polar zone
Which of these statements are correct?
1. Ocean currents are the slow- surface movement of water in the ocean.
2. Ocean currents assist in maintaining the Earth's heat balance.
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4. Ocean currents are affected by the configuration of the ocean.
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