Physical Science Crossword Puzzle

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Across
  1. 2. A push or pull
  2. 8. The rate of change of velocity
  3. 9. Anything around which you can imagine a boundary
  4. 11. Atoms of the same element that have different numbers of neutrons
  5. 13. All the individuals of one species living in a particular area
  6. 14. A charged particle that has either more or fewer electrons than protons
Down
  1. 1. The starting substances that react
  2. 2. When atomic nuclei combine at very high temperatures
  3. 3. A factor that WILL NOT change
  4. 4. The ability to cause change
  5. 5. An attractive force between any two objects that depends on the masses of the objects and the distance between them
  6. 6. A region of space that has a physical quantity (such as force) at every point
  7. 7. The tendency of an object to resist any change in its motion
  8. 10. A device that changes the force or increases the motion from work
  9. 12. The standard by which test results can be compared