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Watch It Move
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| Pushes and Pulls, Big and Small |
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| | A force is a push or a pull. |
| | Gravity is a force that pulls between things and Earth. |
| | Numbers help you count and measure. They tell how many or how much. |
| | You can use numbers to compare the force needed to move things. |
| | Two people provide more force than one person. |
| | Less force is needed to move a lighter thing. |
