a3e5fd4d_Weather_Unit_Plan__4
[0] 2 [1] · Explain the role of water vapor in the atmosphere and how it affects weather · Understand the concept of “humidity” [2] Hook · Place a pan in the middle of the classroom, pour in liquid cologne. · Ask students if they can smell the cologne. · Ask students how the smell of the liquid cologne gets to their noses. · Have students deduce that cologne evaporates. Teach · Using a beaker of water as a prompt, have students deduce that water also evaporates. · Ask students if there is any sign of water in the air. · Use cobalt chloride trick to show the presence of water in air. (Use concentrated cobalt chloride solution, which is pink in the presence of water, and write a message on a piece of paper, dry it over a heating plate. The color will turn blue in the absence of water, which will turn pink again if you let the paper sit in air for a few minutes.) · Pre-lab activity: introduce vocabularies: humidity, relative humidity, dew point, evaporation, and condensation – vocabulary wall · In groups, students discover dew point by doing the activity on page 245, Science Interactions, Course 3 Homework · Daily Weather Log [3] Weather vocabulary wall (vocabulary skill) [4] 
Students have to answer the questions concerning dew point.
Weather Unit Plan
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