How do you spell cloud?

Interpretation: 1 An object suspended in the air formed by tiny water droplets and ice crystals. 2. Like a cloud. 3. Yunnan. 4. Go ahead. 5. Classical Chinese auxiliary words. It means "like this". 6.(Yún) Last name.

Cloud is a visible polymer floating in the air, which is condensed by water droplets or small ice crystals liquefied by water vapor in the atmosphere when it is cold. Clouds are the tangible result of the huge water cycle on the earth.

The sun shines on the surface of the earth, and water evaporates to form water vapor. Once the water vapor is supersaturated, water molecules will gather around the dust (condensation nucleus) in the air, and the generated water droplets or ice crystals will scatter sunlight in all directions, thus creating the appearance of clouds. Moreover, clouds can form various shapes, and they are divided into many kinds because of their different heights and shapes in the sky.

People can't see water vapor or atmospheric movement, but we can see every move of water vapor and atmospheric movement from the evolution of clouds, and water vapor and atmospheric movement play an extremely important role in weather phenomena such as rain, snow, freezing hail.

For thousands of years, the working people in our country have summed up the rich experience of "knowing the sky by observing the clouds" according to the changes in the shape, direction, moving speed, thickness and color of clouds in production practice, and compiled these experiences into proverbs.

"There are hook clouds in the sky and rain in the ground": Hook clouds refer to cirrus clouds with hooks. Behind this cloud, there are often fronts (especially warm fronts), low pressure or low pressure troughs moving, which indicates that rain is coming; "Battery cloud, rain": Battery cloud refers to fort-shaped high cumulus cloud or fort-shaped stratocumulus cloud, which appears in front of the trough with low pressure, indicating that the air is unstable, and thunderstorms usually come every 8- 10 hours.