What is Convectional Rainfall?

Convectional rainfall mostly occurs in the equatorial regions.

Convectional Rainfall

  • High temperature in the equatorial regions results in a high rate of evaporation.
  • When the temperatures are high, the air gets heated. Warm air rises higher in the atmosphere; it then expands and spreads at the top. Ascending currents of hot and humid air result in condensation and the formation of cumulonimbus clouds of a great vertical extent.
  • Such clouds give heavy rainfall. This rainfall is associated with thunder and lightning.
  • The Amazon river basin lies in the equatorial region, and hence, it rains almost every day.

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Various forms of Precipitation are 1. Rain: It is the most common form of precipitation. The droplet of water that precipitates from clouds is known as rainfall.

What is Humidity?

Evaporation changes the water from the liquid form to the gaseous form. Water vapour which is present in the atmosphere is known as humidity.

4 Facts about the Exosphere

The exosphere is the uppermost layer of the Earth. Light gases such as helium and hydrogen float into space from this layer because of the lack of gravity.

Mesosphere Characteristics

The mesosphere is the third layer of the atmosphere and it lies above the stratosphere up to the height of 80 km. It is in this layer that the meteorites burn when they enter the atmosphere from space.

Thermosphere Characteristics

The thermosphere lies above the mesosphere. This layer extends to a height of about 640 km. In this layer temperature rises dramatically, reaching up to 1480°C.


The troposphere is the most important layer of the atmosphere. It extends up to 13 km from the surface of the Earth. The oxygen which we breathe exists in this layer of the Earth.

Types of Rainfall

There are three main types of rainfall — convectional rainfall, orographic or Relief rainfall, and cyclonic or Frontal rainfall.

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