Science

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Across
  1. 1. The amount of matter in an object.
  2. 3. The ability to do work or cause change.
  3. 4. The force that pulls objects toward Earth.
  4. 7. The amount of space an object takes up.
  5. 10. Speed in a given direction.
  6. 12. The smallest unit of matter.
  7. 14. Transfer of heat through direct contact.
  8. 15. A combination of substances that can be physically separated.
Down
  1. 2. The rate of change of velocity.
  2. 5. A measure of how hot or cold something is.
  3. 6. A substance formed when two or more elements chemically combi
  4. 8. Mass per unit volume.
  5. 9. A push or pull on an object.
  6. 11. A force that resists motion between two surfaces.
  7. 13. A substance made of only one type of atom.