Introduction a cloud is composed of millions of little droplets of water or ice crystals when temperature is very low suspended in the air. Hence a cloud can form when water vapor becomes liquid when the humid air is cooled and condenses on tiny particles.

First, type of cloud is a convection cloud warm air rises and the cold air sinks as warm air is less dense than cold air. When the sun shines, the air at the ground level that contains water vapor is heated and it begins to rise, and as the air rises, it begins to cool. Clouds are formed when the humid air is cooled below a critical temperature the water then condenses on tiny suspended particles and forms droplets in the atmosphere. 


Second, clouds can also be formed because of the earth’s surface, mountains or hills. They are then called "orographic clouds" the air is force to move over the mountain an as it ascends, the air cools. If it cools to its saturation point, condensation occurs and the water contained within the air becomes visible as a cloud.

Third, type of cloud is the stratus cloud. This stratus cloud is the lowest of the low clouds. They appear as a grey overcast deck, but can be scattered. Because the stratus cloud is low it too has a base below 6,000 feet and is made of mostly water droplets. The individual stratus cloud has ill-defined edges compared to other low clouds.

Next, type of cloud is the cirrus cloud. The high altitude cirrus cloud like the one shown here have bases above 18,000 feet. They are mostly made of ice crystals and appear wispy, thin; almost hair-like. Cirrus clouds generally occur in fair weather and point in the direction of air movement at their elevation. Then there is another type of cloud called the Cumulonimbus. The cumulonimbus cloud is the tallest of all clouds. They can span all cloud layers and extend to 60,000 feet. These clouds can produce lightning, thunder, heavy rains, strong winds, and tornadoes. Cumulonimbus clouds usually have large anvil-shaped tops because of the stronger winds at those higher levels of the atmosphere.

Finally, the other type of cloud is called the cumulus cloud. This low cloud with a typical base of below 7,000 feet is a cumulus cloud. These clouds have distinct edges, are usually white, puffy with popcorn like appearance. They have a noticeable vertical development. Cumulus clouds can be seen isolated as in this picture or grouped together is clusters. The cumulus cloud as all low cloud sure most often composed of water droplets, but can have ice crystals in colder climates.

In conclusion, the four types of clouds were the cirrus, cumulonimbus, and stratus and cumulus. The cirrus cloud is one of the highest clouds. The stratus cloud is one of the lowest of the clouds, and the cumulonimbus is one of the tallest clouds. Lastly the cumulus is one of the low clouds but a little higher than the stratus.