Describe the role of wind and moisture in causing cold weather injuries. Ask students if they get the same feeling when it is windy. Ask for reasons why they feel cooler. Tell students that they fell cooler because the wind helps to remove heat from the surface of their bodies. Ask students what it feels like when they get out of a pool, lake, bathtub, etc.
Evaporation occurs when a liquid dries.
Allow students to experience the effects of evaporation on temperature. Discuss what the students observe and have them talk about, write about, or draw a picture of other times when they have experienced evaporation and how their bodies felt. Review and discuss cold weather injuries from previous lessons. Ask students why they think the explorers are at risk. Ask students about the temperature in Antarctica.