Science 9th Grade Crossword

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Across
  1. 7. accompanied by or requiring the absorption of heat.
  2. 9. a chemical reaction in which one element is replaced by another in a compound.
  3. 10. the starting materials in a reaction that undergo a chemical change to form a product.
  4. 11. a substance that is present at the end of a chemical reaction.
Down
  1. 1. the symbolic representation of a chemical reaction in the forms of symbols and chemical formulas
  2. 2. the chemical reaction in which a water molecule is eliminated from the reactant molecule.
  3. 3. two or more atoms connected by chemical bonds, which form the smallest unit of a substance.
  4. 4. the production of chemical compounds by reaction from simpler materials.
  5. 5. the process of burning something.
  6. 6. a substance that speeds up a chemical reaction or lowers the temperature or pressure needed to start one.
  7. 8. accompanied by the release of heat
  8. 10. the process by which chemicals interact to form a new chemical.