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Across
  1. 6. substance made up of same type of atoms
  2. 8. number......corresponds to number of protons of each element in periodic table.
  3. 9. be used to separate sand from water.
  4. 13. can be used to separate beans from raisins.
  5. 15. is used to tabulate all elements that we have on earth
  6. 17. liguid becomes a solid
  7. 18. element is symbolized by letter H in the periodic table
  8. 22. substance made up of two or more different elements
  9. 23. is when solid is changing to gas
  10. 24. spreading of particles from highly concentrated area towards a low concentrated area
  11. 25. positively charged subatomic particle
  12. 26. is equal to number of protons + number of neutrons
Down
  1. 1. are molecules that cannot exist on their own such OXYGEN AND HYDROGEN.
  2. 2. be used to separate dissolved salt from water
  3. 3. animals that eat meat and plants
  4. 4. negatively charged particles
  5. 5. ......dense material will float on more dense material.
  6. 7. is when solid changes to gas.
  7. 10. charge of neutrons
  8. 11. is the smallest building block of matter
  9. 12. particles in a .......are closely packed together.
  10. 14. compressible because particles are far from each other.
  11. 16. a process whereby gas is converted to liquid.
  12. 19. process whereby an object increase in size due to increase in heat
  13. 20. everything that we see around us.
  14. 21. mass per unit volume