Rainfall

Precipitation is the fall of water, in any form, from the atmosphere to the surface of the earth. There are 4 types of precipitation-hail, snow, sleet and rain
Rain is the most common rainfall in the tropics. Areas with an annual rainfall of above 1500mm are classified as having high rainfall; areas with an annual rainfall of below 250mm are classified as having low rainfall.
Rainfall is measured in millimetres using a rain gauge
There are 2 types of rainfall

Conventional Rainfall

Conventional rainfall occurs when the earth's surface is intensely heated up. This rainfall is common in the tropics as it receive a great amount of sunlight. Conventional rainfall often have thunder and lightning, last for a short time and rains intensely

 

Relief Rainfall

Relief Rainfall occurs when moist air is forced to rise over high landforms. This rainfall is common at places with high landforms with a large water body next to it.