Lesson 4 Vocab Crossword

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Across
  1. 4. crystals that are considered more valuable than others.
  2. 8. molecules that are arranged in long chains of lots of repeating small molecules.
  3. 9. potential for hydrogen. Expressed as the numbers 1-14.
  4. 10. the substances that you start with when a chemical change is taking place
  5. 11. a type of reaction that occurs when a substance changes form or shape, but still keeps its same molecular structure.
Down
  1. 1. a chemical reaction that takes in heat
  2. 2. a substance with a pH of 7.
  3. 3. a substance that speeds up the chemical reaction
  4. 5. a chemical reaction that gives off heat
  5. 6. a type of reaction that occurs when two or more substances interact with each other and change into a different substance.
  6. 7. a solid that has a regular, repeating arrangement of atoms.