Matter

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Across
  1. 2. the particles are a bit more spread out and slide past and around each other
  2. 3. tiny particles bouncing around to make heat
  3. 7. how much mass is packed into a certain volume
  4. 9. have no charge and are found in the nucleus
  5. 12. the particles (tiny pieces) are packed tightly together and only vibrate a little
  6. 13. have a positive charge and are found in the nucleus
  7. 14. a solid where the atoms are connected in a regular repeating pattern - salt and diamonds
Down
  1. 1. the energy of motion
  2. 4. have a negative charge and orbit the nucleus
  3. 5. the particles are far apart and move very fast
  4. 6. a tiny building block that makes up everything
  5. 8. when the same group of atoms are connected again and again to form something bigger - like a chain
  6. 10. things we can observe
  7. 11. a substance made up of two or more different elements