Wyatt's Crossword

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Across
  1. 3. a value written as a simple number multipliedby a power of 10
  2. 5. the smallest unit of a substance that exhibits all of the properties characteristic of that substance
  3. 7. the smallest particle that has the properties of an element
  4. 8. is anything that has mass and occupies space
  5. 9. measure of space (liters)
Down
  1. 1. forced with which gravity pulls on a quantity of matter
  2. 2. the chemical symbols and numbers indicating the atoms contained in the basic unit of a substance
  3. 4. a substance made of atoms of more than one element found together
  4. 5. a measure of the quantity of matter in an object
  5. 6. a substance that cannot be broken down into simpler substances