Motion

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Across
  1. 3. constant speed looks like a _____ line on a graph
  2. 4. element with only one proton
  3. 6. there are 2.2 pounds in one ______
  4. 9. change in velocity per unit time
  5. 13. speed is often measured in meters per
  6. 14. background object used for comparison is a frame of _____
  7. 16. a measurement of how much mass is in how much motion
  8. 17. change in position over time
  9. 18. speed = distance / ?
  10. 19. subatomic particle without a charge
  11. 20. most common frame of reference
Down
  1. 1. there are 100 ___ in a meter
  2. 2. carbon has one radioactive _____, carbon-14
  3. 3. if rowing upstream, you _____ the speed of the stream from your rowing speed
  4. 4. group 17 elements
  5. 5. velocity is _____ plus direction
  6. 7. momentum depends on velocity and _____
  7. 8. speed AND direction
  8. 10. the metric system is based on units of this number
  9. 11. total momentum remains constant unless an outside ____ acts on the object
  10. 12. a merry-go-round is accelerating because it is constantly changing ______
  11. 15. negative acceleration (slowing down)