LEARNING TARGET WATER CYCLE What are the atmospheric

LEARNING TARGET WATER CYCLE What are the atmospheric conditions needed for various processes of the water cycle to occur? Standard: S 6 E 3 b. Relate various atmospheric conditions to stages of the water cycle 1

Water Cycle Diagram 2

Remembering the Water Cycle Water Vapor Molecule s 3

Stages of the Water Cycle are connected to atmospheric conditions. Turn to an elbow partner and discuss what is meant by atmospheric condition and possible examples. 4

Atmospheric condition refers to the state of the atmosphere in terms of temperature and wind and clouds and precipitation. 5

Use your graphic organizer to record important information during the lesson. 6

Evaporation 7

Water Vapor Molecules Heat evaporates water into water vapor (gas). Water vapor molecules fit into spaces among the molecules that make up air. 8

Humidity is the amount of water vapor in the air. 9

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How does temperature affect evaporation? What atmospheric condition occurs due to evaporation? *Higher temperatures = more evaporation. *More evaporation = higher humidity (more water vapor in the air) 11

COOLING temperatures change water vapor to liquid water. 12

Clouds form when water vapor condenses and cools in tiny droplets around small particles of dust. 13

Dew Point is the temperature at which air is saturated (full) and condensation forms. 14

Other Forms of Condensation can occur whenever air becomes saturated (holding as much water vapor as it can). 15

Other Forms of Condensation When water vapor molecules suspended in the atmosphere at or near the earth's surface cool and condense, fog can occur. Fog is a cloud next to 16

Other Forms of Condensation Dew forms when water condenses from the air, usually at night, onto cool surfaces near the ground. Frost forms when temperatures are near 0°C. 17

Lab/Demonstration of Condensation 18

Think, Pair, Share: Using your knowledge, explain why condensation occurs on the glass shown below. 19

Condensation Precipitation Water droplets combine and grow too large for the atmosphere to support their weight and the droplets fall. 20

Condensation Precipitation Air temperature = type of precipitation to form Rain Snow Hail Sleet Falling Water vapor Water water changes falling in freezes passes directly to a temperatur inside a through a solid es above cloud before layer of because of freezing it falls. freezing air freezing Thunderstor near the temperature ms surface http: //www. atmosedu. com/meteor/Animations/51_Sleet/51. html 21

Condensation Precipitation Temperatur The atmospheric e condition that affects each stage of the water cycle 22

Turn to an elbow partner and discuss how temperature affects each stage of the water cycle. Temperatur The atmospheric e condition that affects each stage of the water cycle 23

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Summarizer 25