how do clouds form?

Answer 1

Clouds form when air is cooled to its dewpoint or the temperature, if the air is cooled, it reaches saturation. Air can reach saturation in a number of ways. The most common way is through lifting.

As a bubble or parcel of air rises it moves into an area of lower pressure (pressure decreases with height). As this occurs the parcel expands. This requires energy, or work, which takes heat away from the parcel. So as air rises it cools. This is called an adiabatic process.

The rate at which the parcel cools with increasing elevation is called the "lapse rate". The lapse rate of unsaturated air (air with relative humidity <100%) is 5.4°F per 1000 feet (9.8°C per kilometer). This is called the dry lapse rate. This means for each 1000 feet increase in elevation, the air temperature will decrease 5.4°F.
Since cold air can hold less water vapor than warm air, some of the vapor will condense onto tiny clay and salt particles called condensation nuclei. The reverse is also true. As a parcel of air sinks it encounters increasing pressure so it is squeezed inward.

This adds heat to the parcel so it warms as it sinks. Warm air can hold more water vapor than cold air, so clouds tend to evaporate as air sinks.

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Answer 2

Clouds are formed by rising air.There are three main causes.
Convection:- A hot land surface heats the air,causing pockets of warm air to rise.This usually results in one type of cloud called cumulus clouds.
Frontal cloud:- Cold and warm fronts meet and the warm air is forced up.This usually results in another type of cloud called stratus clouds.
Orographic lifting:-Air is forced up the side of a mountain.This also results in cumulus clouds.
As air rises, it cools.Cool air holds less water vapour than warm air,and it reaches a point where condensation takes place.Condensation takes place in the presence of what is called condensation nuclei which are tiny pieces of dust(or salt particles ,droplets of sulphuric acid,smoke etc) that are floating in the air.Water vapour thus condenses around these condensation nuclei and forms tiny water droplets (or at high altitudes,ice crystals).Millions of such water droplets(or tiny ice crystals) come together to form clouds.

Answer 3

The atmosphere contains a great deal of water vapor, water which has transpired from the leaves of trees and vegetation, and evaporated from the oceans, lakes, and rivers in what is referred to as the hydrological cycle.

When air is lifted by terrain, by heating and convergence of air near the surface, or by frontal lifting, it is cooled. When its temperature drops to near the dew point of the air, water vapor will condense and form cloud droplets. These cloud droplets may continue to grow by a process called coalescence, or they may once again evaporate. In this way clouds are continually changing their constituents and their character.

Answer 4

water vapor from lakes and ponds raise up and form clouds to put it simply

Answer 5

What forms a cloud is that it rises ,expand,s and cools

Answer 6

whenwater forms