Science 6 - Matter Unit Review Crossword

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Across
  1. 2. The element ___ makes up 18% of the Human Body.
  2. 4. A chemical ___ is made of one or two letters that represent an element.
  3. 5. A chemical ___ illustrates how elements become rearranged in a chemical reaction and can can be used to model chemical changes.
  4. 6. The Law of Conservation of Matter says that matter cannot be created or ___ in any chemical or physical change.
  5. 7. Chemical ___ are the forces that hold atoms together to form new substances.
  6. 9. Protons & neutrons are found in the ___ of an atom.
  7. 10. A proton is a subatomic particle that has a ___ charge.
  8. 11. The element ___ makes us most of the Earth's Atmosphere.
  9. 12. The element ___ makes up about 30% of the Earth's Crust.
  10. 13. Chemical bonds are formed with ___.
  11. 16. A(n) ___ is two or more atoms of different elements that are chemically combined.
  12. 17. ___ number minus atomic number equals number of neutrons.
Down
  1. 1. A(n) ___ is a subatomic particle that has no charge.
  2. 3. On a periodic table square, the ___ ___ tells you the number of protons in the atom.
  3. 4. A(n) ___ is a small number written slightly below and to the right of a chemical symbol that shows how many atoms of an element are in a compound.
  4. 5. A(n) ___ is a form of matter made up of one type of atom.
  5. 8. ___ are the basic building blocks of all matter.
  6. 10. The atoms of one element differ from those of another element in the number of ___.
  7. 14. An electron is a subatomic particle that has a ___ charge and is located outside the nucleus.
  8. 15. A chemical ___ is a combination of chemical symbols used to represent a compound.