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In this activity, learners make their own "tornado" using two soda bottles and water.

In this activity, learners discover how to determine the distance to a lightning strike or nearby thunderstorm.

In this activity/demonstration, learners observe what happens when two ping pong balls are suspended in the air by a hair dryer. Use this activity to demonstrate how rain drops grow by coalescence.

In this online Flash game, learners will captain a sailing challenge, adjusting boat direction and sails, seeking the way to take greatest advantage of varying wind speeds and directions to catch the