1. Chapter 9 Vocab Review
8th Grade

2. A place or object used for comparison to determine if something is in motion
Reference Point

3. The rate at which an object is moving at a given instant in time.
Instantaneous speed

4. Scientists use this same measurement all over the world so they can communicate clearly. It is also used to describe the distance an object moves.
International System of Units (SI)

5. The total distance traveled divided by the total time.
Average speed

6. An object is in ____________ if its distance from another object is changing.
Motion

7. The steepness of a line on a graph
Slope

8. Speed in a given direction.
Velocity

9. The rate at which velocity changes.
Acceleration

10. The distance the object travels per unit of time.
Speed