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