WHY? This is Bernoulli's Principle: faster moving air exerts a lower pressure than the air that is not moving. The faster moving air decreases the air pressure between the balloons. The air pressure on the far sides of the balloons is greater causing the balloons to move toward each other as the higher pressure rushes toward the lower pressure area. ASSESSMENT: Can the student communicate what they observed?

Student is able to communicate that the air pressure on the far side of the apples is higher and this pushes the balloons inward towards each other. Student is able to communicate that the air pressure on the far side of the balloons pushes the balloons inward toward each other. Student is able to communicate that the balloons moved inward. Student is able to communicate that the balloons moved.

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Last modified: Thu Mar 5 16:12:14 PST 1998

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