Why Do Clouds Stay Up?
Clouds form from water that has evaporated from lakes, oceans, and rivers, or from moist soil and plants. Clouds are water droplets, and water is heavy, so how do they stay up? There are several reasons, but the most important reason clouds stay up is because warm air rises. Air can hold only a certain amount of water vapor at any given temperature. Warm air can hold more water vapor than cool air can. When any air rises in the open atmosphere, it moves into a region of lower pressure, expands, and the temperature of the air falls (in other words, rising air normally gets colder). However, if the rising air is full of evaporated water, the falling temperature can cause the water vapor to condense (change to a liquid) and become a white mist made of tiny droplets. For water vapor to condense, particles so small they can be seen only through a microscope must be present. These particles, called condensation nuclei, become the centers of the droplets. Many condensation nuclei are tiny salt particles or small particles present in smoke. Most droplets measure from 1/2500 to 1/250 inch (0.01 to 0.1 millimeter) in diameter. When condensation takes place, energy is released, so the water-filled air bec
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Some common words found in the essay are:
Meteorological Commission, Nitrogen Oxygen, Stay Clouds, Weight H2, air rises, water vapor, clouds stay, Howard English, water droplets, vertical development, Lamarck French, Carbon Dioxide, vapor condense, evaporated water, water vapor condense, type cloud, arranged lines, rain snow, International Meteorological, drops cooling air, rises pressure drops, reason clouds stay, warmer surrounding air,
Approximate Word count = 1335
Approximate Pages = 5 (250 words per page double spaced)
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