science

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Across
  1. 4. an element used to make 'chips' for computer circuit
  2. 7. change from liquid to solid
  3. 9. a gas with low density that is put n balloons
  4. 11. what we breath out
  5. 12. the chemical element of atomic number 13, a light silvery, grey metal
  6. 13. what we drink
  7. 14. change from liquid to solid
  8. 15. inside nucleus
  9. 16. outside the nucleus
  10. 18. a form of energy resulting from the existence of charged particles
  11. 19. a material through which electric currents can pass
Down
  1. 1. a solid non-metal in the form of shiny, purple crystals
  2. 2. Building blocks of life
  3. 3. sedimentary rock that consists of sand or quartz
  4. 5. the quality of being hot
  5. 6. a hard sedimentary rock
  6. 7. a process that involves a rearrangement of the molecule or ionic structure
  7. 8. change from liquid to gas
  8. 10. change from solid to liquid
  9. 17. what we breathe in