rain fall-explain?

Answer 1

If you are asking for someone to explain the water cycle:

Liquid water evaporates with heat.
The vapors rise into the upper atmosphere.
In these areas the vapor cools, becomes more compact, and gains weight
After it gets heavy enough, it falls back to earth.

Then it all happens again.

Answer 2

Rain is a source of precipitation which forms when separate drops of water fall to the Earth's surface from clouds. Not all rain reaches the surface, however; some evaporates while falling through dry air. When none of it reaches the ground, it is called virga, a phenomenon often seen in hot, dry desert regions. The scientific explanation of how rain forms and falls is called the Bergeron process

Rain plays a role in the hydrologic cycle in which moisture from the oceans evaporates, condenses into clouds, precipitates back to earth, and eventually returns to the ocean via streams and rivers to repeat the cycle again. There is also a small amount of water vapor that respires from plants and evaporates to join other water molecules in condensing into clouds.

The amount of raindrop is measured using a rain gauge. It is expressed as the depth of water that collects on a flat surface, and is routinely measured with an accurary up to 1,000,000 cloud droplets are equal to 1 drop of rain that is falling down in this city. The cloud have something to do with rain too.

Falling raindrops are often depicted in cartoons or anime as "teardrop-shaped" — round at the bottom and narrowing towards the top — but this is incorrect. Only drops of water dripping from some sources are tear-shaped at the moment of formation. Small raindrops are nearly spherical. Larger ones become increasingly flattened on the bottom, like hamburger buns; very large ones are shaped like parachutes.[1] The shape of raindrops was studied by Philipp Lenard in 1898. He found that small raindrops (less than about 2 mm diameter) are approximately spherical. As they get larger (to about 5 mm diameter) they become more dough nut-shaped. Beyond about 5 mm they become unstable and fragment. On average, raindrops are 1 to 2 mm in diameter. The biggest raindrops on Earth were recorded over Brazil and the Marshall Islands in 2004 — some of them were as large as 10 mm. The large size is explained by condensation on large smoke particles or by collisions between drops in small regions with particularly high content of liquid water.


RaindropsRaindrops impact at their terminal velocity, which is greater for larger drops. At sea level and without wind, 0.5 mm drizzle impacts at about 2 m/s, while large 5 mm drops impact at around 9 m/s.[2] The sound of raindrops hitting water is caused by bubbles of air oscillating underwater. See droplet's sound

Generally, rain has a pH slightly under 6. This is because atmospheric carbon dioxide dissolves in the droplet to form minute quantities of carbonic acid, which then partially dissociates, lowering the pH. In some desert areas, airborne dust contains enough calcium carbonate to counter the natural acidity of precipitation, and rainfall can be neutral or even alkaline. Rain below pH 5.6 is

Answer 3

In meteorology, precipitation is any kind of water that falls from the sky as part of the weather. This includes snow, rain, sleet, freezing rain, hail, and virga. Precipitation is a major part of the hydrologic cycle, and is responsible for depositing most of the fresh water on the planet. Precipitation is generated in clouds, which reach a point of saturation; at this point larger and larger droplets (or pieces of ice) form, which then fall to the earth under gravity. ...
Rain plays a role in the hydrologic cycle in which moisture from the oceans evaporates, condenses into clouds, precipitates back to earth, and eventually returns to the ocean via streams and rivers to repeat the cycle again. There is also a small amount of water vapor that respires from plants and evaporates to join other water molecules in condensing into clouds.

The amount of rainfall is measured using a rain gauge. It is expressed as the depth of water that collects on a flat surface, and is routinely measured with an accurary up to 0.1 mm or 0.01 in. It is sometimes expressed in liters per square meter (1 liter/m² = 1 mm).

effective rainfall ,relief rainfall,rainfall rate,orographic rainfall, one-hour rainfall rate,1% rainfall point rainfall,rainfall intensity,rainfall duration,net rainfall.

wikipedia.org/wiki/Rainfall...all the best.

Answer 4

The water vapour molecules rising from the ground to the sky get entangled with the dust particles,such a collection becomes a cloud which further rises.However due to the low tempratures the cloud gets saturated with water vapour .There is a temp difference at the top and the bottom of the cloud resulting in movement of air mass in the cloud it self.this creates friction amongst the vapour molecules creating static electric charge and a great potential difference.(Lightening starts at this time)At a certain point of time the cloud can no longer hold the moisture(due to saturation of vapour at that temperature) thus vapour condences as water and falls as rain

Answer 5

When the sun shines water changes into water vapour &rises up .Their the water vapour &the dust particals form a cloud when the cloud becomes bigger & deeper when they become too heavy the fall down as rain.