2. A push or a pull

3. A change in position. I was in Kansas City. Now I’m in St. Louis

4. All the things around you that help you describe motion. When you watch a runner he is moving, but the trees behind him are not. When you are the runner everything you pass seems to be moving.

5. Motion that is described based on a frame of reference. Relative to the trees the runners are moving. The trees are also moving because of the Earth’s rotation, but they don’t seem to be moving because there is no frame of reference.

6. A certain place Right of the bookshelf Left of the bookshelf On top of the bookshelf

7. How fast something is moving-the measure of an object’s change in position during a unit of time. I can go 100 miles per hour (MPH) if I want to.

8. Any change in speed or direction of an object’s motion. Slower Faster Curve Turn Stop Start

9. A unit to measure force.

10. A force that pulls objects toward each other. It keeps you on earth.

11. A force that keeps objects that are touching each other from sliding past each other easily.

12. A measure of the force of gravity on an object. I weigh less on the moon than on Earth. On Jupiter I weigh twice as much as I do on Earth.