Physics - What is Physics?

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Across
  1. 2. measured in meters and is shortest path between A and B on a map
  2. 3. _____ physics is used for atoms but never planets
  3. 6. word that means Amount in physics
  4. 8. the study of lenses and its action on light
  5. 10. measured in meters per second and must have direction given
  6. 11. Einstein's Theory of time and space called _____ was revolutionary
  7. 12. the study of motion, velocity and acceleration
  8. 15. Study of electricity & magnetism and how they
  9. 17. the study of heat and its effects
  10. 18. End of a vector
  11. 19. ____ is represented by an arrow in physics
  12. 20. total path taken during a trip (not the shortest)
Down
  1. 1. a vector quantity needs both magnitude and ___
  2. 4. How packed a material is and is not a vector quantity
  3. 5. the point at which you choose to measure a quantity
  4. 7. Beginning of a vector
  5. 9. the science of the study of matter and energy
  6. 13. another name for classical physics
  7. 14. measured in meters per second and doesn't matter in which direction
  8. 16. how fast the speed of an object increases