Activity: Watching cold air and warm air move.
Stand in front of a vertical-style freezer and open the door! Wait a few moments and then hold a burning candle close to the top of the open freezer and another close to the bottom. Stay as still as possible to avoid creating drafts of air resulting from your movement. Observe which way the flame leans near the top of the door opening and near the bottom.
Sketch the freezer set-up or print this page. Draw arrows indicating the direction of airflow. Label "warm" and "cold" air.
Answer these questions about which direction the air is moving.
Return to the page asking "Why Did The Air Turn Cold?"