What is rain easy words?
Definition of rainfall 1 : the amount of precipitation usually measured by the depth in inches. 2 : rain sense 2a.
Why is rain called precipitation?
Precipitation occurs when a portion of the atmosphere becomes saturated with water vapor (reaching 100% relative humidity), so that the water condenses and "precipitates" or falls.
What is rainfall in biology?
rain. water falling in drops from the clouds; the descent of water from the clouds in drops.
What is rainfall water?
Definition of rainwater : water fallen as rain that has not collected soluble matter from the soil and is therefore soft.
What do you mean by rainfall Class 7?
Rainfall can be defined as the precipitation in the liquid form.
What are the types of rainfall Class 7?
On the basis of the mechanism, there are three types of rainfall, as shown below.
- Convectional Rainfall.
- Cyclonic Rainfall.
- Orographic Rainfall.
What is rainfall answer?
Rainfall is the amount of precipitation, in the form of rain (water from clouds), that descends onto the surface of Earth, whether it is on land or water. It develops when air masses travel over warm water bodies or over wet land surfaces.
Is rainfall same as precipitation?
(i)Rainfall is a type of precipitation when moisture falls on the earth in the form of drops of water. (i)It is the collective name given to different forms of release of moisture after condensation.
What is rain Class 9?
Rain is droplets of water that are condensed as a result of evaporation. During the water cycle formation of clouds takes place. Rain is also called precipitation. Water is absorbed from different water bodies, a large amount of which vaporizes and enters the atmospheric air.
What is called cyclonic rainfall?
Cyclonic or Frontal rain: This type of rainfall occurs when warm and cold air meets each other. Since warm air is lighter, it rises above the cold air. The rising air is then cooled beyond the saturation point resulting in heavy rainfall. Such rainfall lasts only for few hours.
What are the different types of rainfall?
There are three rainfall types:
- Convectional rainfall.
- Orographic or relief rainfall.
- Cyclonic or frontal rainfall.
What is rain Wikipedia?
Rain is liquid water in the form of droplets that have condensed from atmospheric water vapor and then become heavy enough to fall under gravity. Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on the Earth.
How is rainfall caused Class 11?
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. In this sort of rain is that the windward slopes receive greater rainfall.
What is Convectional rain?
Convectional rainfall occurs when the energy of the sun (or insolation) heats the earth's surface and causes water to evaporate changing to water vapor. This warm, moist air then rises, and as it rises, it cools.
What is orographic and convectional rainfall?
Convectional rainfall generally occurs in the equatorial regions where the temperature and rate of evaporation is quite high. Orographic rainfall: This type of rainfall is also known as relief rainfall. When moisture bearing winds strike a mountain range, it is forced to ascend or go up.
What is rain in geography?
Rain is liquid precipitation: water falling from the sky. Raindrops fall to Earth when clouds become saturated, or filled, with water droplets. 6 – 12+ Earth Science, Geography, Meteorology.
What is rain for kids?
Rain is the liquid form of water that falls from the sky in drops. Rain fills lakes, ponds, rivers, and streams. It provides the fresh water needed by humans, animals, and plants. If too much rain falls, however, dangerous flooding may happen.
How is rainfall caused class 7th?
Answer. When water on the Earth's surface is heated by the Sun, it evaporates and turns into water vapour which rises into the air. When the air cools it condenses around some dust or other particles in the air, called condensation nuclei. These small droplets then become visible as clouds.
What is cyclonic rainfall?
Cyclonic or Frontal rain: This type of rainfall occurs when warm and cold air meets each other. Since warm air is lighter, it rises above the cold air. The rising air is then cooled beyond the saturation point resulting in heavy rainfall. Such rainfall lasts only for few hours.
What is cyclonic and convectional rainfall?
1. Convectional rainfall is a type of rainfall that involves the formation of convection currents. The cyclonic rainfall, on the other hand, is caused due to cyclones. A cyclone has a warm front and a cold front with a substantial difference in the temperatures.
What is Convective rainfall?
Convective rain This is when the Sun shines on the ground and heats a shallow layer of air close to it. This air is now warmer than the surrounding air, so it rises up in the atmosphere (warm air rises). The higher you go up in the atmosphere, the colder it is.
How is rainfall classified?
Meteorologists classify rain according to its rate of fall. The hourly rates relating to light, moderate, and heavy rain are, respectively, less than 2.5 mm, 2.8 to 7.6 mm, and more than 7.6 mm.
How is rainfall caused Class 7?
When a portion of the earth becomes heated more than its surrounding, it creates significant amount of evaporation. Convection currents then push up the moist air and cumulonimbus clouds are formed. These clouds result in convectional rainfall.
What is latitudinal rainfall?
Regional and latitudinal distribution. … The regions of highest rainfall are found in the equatorial zone and the monsoon area of Southeast Asia. Middle latitudes receive moderate amounts of precipitation, but little falls in the desert regions of the subtropics and around the poles.
What is orographic rainfall?
orographic precipitation, rain, snow, or other precipitation produced when moist air is lifted as it moves over a mountain range. As the air rises and cools, orographic clouds form and serve as the source of the precipitation, most of which falls upwind of the mountain ridge.
What’s frontal rainfall?
Frontal rain This is when cold air meets warm air in a 'weather front'. Warm air rises, so when it bumps into the cold air, it rises above it. However, like when you're climbing a hill, the higher you go up in the atmosphere, the colder it is. So the warm air that has risen up in the atmosphere now begins to cool down.
Is rain a drizzle?
Definition of 'drizzle' Drizzle is light rain falling in fine drops.
What type of rainfall is in India?
Most of India's rainfall is convectional. The convectional rainfall is prevalent in equatorial regions. In these, the warm air rises up and expands then, reaches at a cooler layer and saturates, then condenses mainly in the form of cumulus or cumulonimbus clouds.
What is a Convectional rainfall?
Convectional rainfall occurs when the energy of the sun (or insolation) heats the earth's surface and causes water to evaporate changing to water vapor. This warm, moist air then rises, and as it rises, it cools.
What is forest rainfall?
The forest creates fresh water runoff for the streams and rivers, and helps pull rainfall in coastal areas inland. In India, deforestation has caused a 30% drop in rainfall.