Readworks

Today I learned that a cloud is a mass of water drops or ice crystals suspended in the atmosphere. Clouds form when water condenses in the sky. The condensation lets us see the water vapor. There are many different types of clouds. Clouds are an important part of Earth's weather and climate. Clouds form from water in the sky. The water may evaporate from the ground or move from other areas. Clouds are categorized primarily by two major factors - location and shape. High clouds form several kilometers up in the sky, with the exact height depending on the temperatures where they form. Low clouds generally form within a kilometer or two of Earth's surface. In fact, low clouds can even form touching the ground, when they are called fog. Middle-level clouds form between low and high clouds.

I also learned Clouds help regulate Earth's energy balance by reflecting and scattering solar radiation and by absorbing Earth's infrared energy. Clouds are required for precipitation to occur and, hence are an essential part of the hydrologic cycle. Clouds form from water in the sky. The water may evaporate from the ground or move from other areas. Clouds are categorized primarily by two major factors - location and shape. High clouds form several kilometers up in the sky, with the exact height depending on the temperatures where they form. Low clouds generally form within a kilometer or two of Earth's surface.  

In parts of the world, the difference in how many clouds cover the ocean versus how many cover land is so clear that the outlines of continents can be found just by looking at the clouds.