Today we learned about how the earth spins. One of the experiments we did was to make a pendulum. We filled a two liter soda bottle with sand and hung it on a tree branch. When we swung it, it did not go just straight. It changed directions slightly on every swing. Another thing is that while it was swinging, it went in small circles. The earth is like the pendulum, it rotates and spins. 
Another thing we did to learn about the earth is we went to the darkest room in the house. One of us held a rubber ball and spun it counter clockwise, while the other one shone a flashlight on it. This was to represent the sun and earth. Only half of the "earth" was hit by the flashlight at a time. All of the experiments we did were really cool.
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