Chemicals( 6-8th)

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Across
  1. 2. A change in the size, shape, or state of a substance without changing what it is made of.
  2. 3. A group of two or more atoms that are chemically bonded together.
  3. 8. The smallest unit of an element that still has the properties of that element.
  4. 9. A substance that starts a chemical reaction and is changed during the reaction.
  5. 10. A new substance formed after a chemical reaction.
  6. 11. A pure substance made of only one type of atom. Elements cannot be broken down into simpler substances.
Down
  1. 1. A substance that speeds up a chemical reaction without being used up.
  2. 4. Change A change that forms one or more new substances with different properties.
  3. 5. The ability to do work or cause change. Chemical reactions can absorb or release energy.
  4. 6. Two or more substances combined together without forming a new substance.
  5. 7. A substance made of two or more different elements that are chemically combined.