what conditions are necessary for clouds to form?

Answer 1

The air needs to be supersaturated (relative humidity around 101-102%) and there need to be particles for the water droplets to form on. These are called cloud condensation nuclei (CCNs) and are usually dust particles, salt, pollution, etc. As the air cools, it reaches the dewpoint and water begins to condense on CCNs, forming cloud droplets which form the visible cloud. The air usually cools via rising motion (most clouds form this way) or radiational cooling (in the case of fog).

So basically you need two things: sufficient moisture and CCNs

Answer 2

The sun should heat the land and sea area.The land or sea should heat the air above it and make it rise.The rising air should contain enough water vapour and should rise atleast upto the condensation level.At that level (where the dew point is reached), the water vapour should condense on condensation nuclei(which is usually available in the atmosphere) and become water droplets.Then all the tiny droplets together form clouds.

Answer 3

To learn More see this link
http://www.srh.noaa.gov/srh/jetstream/synoptic/clouds.htm

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.

Answer 4

in the beginning, heat,moist air would desire to upward thrust,strengthen and funky.chilly air can no longer carry as lots water vapour as heat air.So,a number of the vapour condenses directly to tiny products of dirt(called condensation nuclei which will desire to be available in the air and that is often available in lots in air)and varieties a tiny water droplet around each and every dirt particle.hundreds of thousands of such droplets come at the same time to form clouds.

Answer 5

and the sun. hey ang, that's 5 points each, lol You can make your own cloud here: http://www.csupomona.edu/~hcmireles/Courses/Sci210/Activities2005/MLittle2.html

Answer 6

moisture.