physical science

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Across
  1. 2. Force that pulls objects toward each other.
  2. 3. Speed of an object in a specific direction.
  3. 5. Force that opposes motion between two surfaces.
  4. 7. The smallest unit of an element.
  5. 9. Distance traveled divided by time.
  6. 12. Positively charged particle in an atom's nucleus.
  7. 13. A pure substance made of only one kind of atom.
  8. 14. The amount of matter in an object.
  9. 16. Atomic particles with no electrical charge.
Down
  1. 1. The ability to do work.
  2. 4. Negatively charged particles orbiting the nucleus.
  3. 6. Resistance of an object to change its motion.
  4. 8. Two or more atoms bonded together.
  5. 10. The amount of space an object occupies.
  6. 11. Mass per unit volume of a substance.
  7. 15. A push or a pull on an object.