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Cloud Types and Formation, Water Cycle, Precipitation Chapter 7 Lesson 2 How does the water cycle affect weather? cloud forming cloud forming warm air warm air cloud forming warm air cool air - Water in the Atmosphere How Clouds Form •Clouds form when warm, moist air rises and cools. Water vapor condenses on tiny particles to form liquid water or ice crystals. - Water in the Atmosphere Types of Clouds •Scientists classify clouds into three main types based on their shape: cirrus, cumulus, and stratus. Clouds are further classified by their altitude. What are the types of clouds? 13 km cirrocumulus high clouds cirrostratus cirrus cumulonimbus 5 km middle clouds altocumulus altostratus low clouds 2 km stratocumulus cumulus stratus nimbostratus 0 km - Precipitation Water Droplets •Droplets come in many sizes. A raindrop has about one million times as much water in it as a cloud droplet. What are the different types of precipitation? Rain Sleet Hail Snow - Precipitation How Hail Forms •Hailstones start as small pellets of ice in cumulonimbus clouds. They grow larger as they are repeatedly tossed up and down until they become so heavy they fall to the ground. - Water in the Atmosphere Asking Questions Question Answer How does the water cycle work? Water evaporates from the surface, condenses to form clouds, and falls to Earth as rain or snow. What is relative humidity? The percentage of water vapor in the air compared to the maximum amount air can hold at that temperature How do clouds form? Water in the air condenses on tiny particles in the air to form liquid water or crystals. Can you determine weather conditions by looking at clouds? Yes; each type of cloud is associated with a particular type of weather.
