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Ball and String Demonstration
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Fall 2009-Day 13
Ball and String Demonstration
| As Emily clarified many of the moon concepts, questions began arising about the orbit of the earth. Emily: “We think the moon as moving around the earth, but why is it moving around the earth?” *Emily swings the ball and string in a circle above her head* “Why is the moon moving around the earth?” Student: “because you're swinging it.” Emily: “Whats making it go around? Why isn't it just flying off?” Student: “The string!” With the ball and string visual representation, the students were able to see how the earth has a gravitational pull on the moon. |  |
