110 likes | 229 Views
Clouds. HOW ARE CLOUDS FORMED?. All air contains water, but near the ground it is usually in the form of an invisible gas called water vapor.
E N D
HOW ARE CLOUDS FORMED? • All air contains water, but near the ground it is usually in the form of an invisible gas called water vapor. • When warm air rises, it expands and cools. Cool air can't hold as much water vapor as warm air, so some of the vapor condenses onto tiny pieces of dust that are floating in the air and forms a tiny droplet around each dust particle. • When billions of these droplets come together they become a visible cloud.
What are clouds make up of? • A cloud is a large collection of very tiny droplets of water or ice crystals. The droplets are so small and light that they can float in the air.
CUMULUS CLOUDS • Cumulus clouds are white and puffy. They have flat bottoms and are low in the sky. • Cumulus clouds usually mean fair weather. If they grow tall, they can become thunderheads and bring rain.
Stratus Clouds • Stratus clouds are uniform grayish clouds that often cover the entire sky. A stratus cloud will mean a grey, drizzly day. • They resemble fog that doesn't reach the ground. Light mist or drizzle sometimes falls out of these clouds • Stratus clouds can also bring light snow if the air temperature closer to the ground is cool enough. • Fog is a stratus cloud at ground level. They look like a low gray blanket.
Nimbus • A nimbus cloud arrives inside the form of dark precipitous cloud. Nimbus is known as cloud or rain storm within the Latin language. • These clouds produce heavy, rain, snow or hail. • Nimbus clouds are low lying clouds.
Cirrus • Cirrus clouds are the highest clouds. • They usually mean fair or pleasant weather. • They look white and feathery. They are often described as wispy or curly clouds. • Cirrus clouds can be a sign of changing weather in the next 24 hours. • These are the most common types of clouds.