Science Finals Review

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Across
  1. 2. needs energy
  2. 4. Are substances composed of macromolecules.
  3. 6. Join with similar molecules to form
  4. 8. a reactant in a chemical reaction.
  5. 9. Holds water molecules together and movement of water in plants; surface tension.
Down
  1. 1. breaking of the bonds.
  2. 3. A substance that is made up of two elements.
  3. 4. no energy
  4. 5. A substance that is altered during the chemical reaction.
  5. 7. what type of energy does active transport need?