WHY? Everything on this planet is in some type of motion. When a constant force acts on an object, the object accelerates and the acceleration is proportional to the force. This is what takes place when the children blow on the rubber ball. When children experience motion through an experiment they can see how their energy (breathe through the straw) produces that motion. ASSESSMENT: Can the student communicate what they observed?

Student is able to communicate that blowing through the straw causes the rubber ball to accelerate and that the motion of the ball changes when the other child blows in the opposite direction on the ball. Student is able to communicate most of what happens when blowing through the straw on the rubber ball. The child can describe that the motion of the ball changes when the other child blows in the opposite direction on the ball. Student is able to communicate some of what happens when blowing through the straw on the rubber ball. The child can describe something of the motion of the ball when the other child blows in the opposite direction on the ball. Student is able to communicate one of the things that happens when blowing through the straw on the rubber ball.

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Last modified: Fri Feb 13 14:35:23 PST 1998

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