Matter

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Across
  1. 3. matter that has a fixed composition and definite properties
  2. 4. the smallest unit of an element that keeps the element's chemical properties
  3. 6. a substance made up of atoms of different elements
  4. 9. when one or more substances are changed into a new substance
  5. 10. a substance that can not be broken down into simpler substances by chemical means
Down
  1. 1. affects one or more physical properties of a substance without changing its identity
  2. 2. a measurement of how much matter is contained in a certain volume of a substance
  3. 5. the smallest unit of a substance that behaves like that substance
  4. 7. anything that has mass and can take up space
  5. 8. a combination of substances that are not chemically combined