Across
- 2. calculated by distance / speed
- 5. calculated by speed x time
- 7. a measurement with size and direction
- 8. the relative size of the difference between an experimental value and the true actual value
- 11. the instrument in a car that tells you how fast you're going
- 12. SI Unit for time
Down
- 1. the speed at any instant
- 3. a measurement with size only (no direction)
- 4. SI Unit for distance
- 6. motion is always ______ to something else
- 9. calculated by distance / time
- 10. unless otherwise specified, we refer to motion relative to the ______