Chapter 7.1

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Across
  1. 2. A characteristic of a substance that doesn't change.
  2. 7. What our design cannot or should not do. The Limits.
  3. 9. Feels Warm. Energy Exits the reaction system. Energy flows from the reaction system to the surroundings.
  4. 10. The original substances you start with before the chemical reaction occurs.
  5. 15. A homogeneous mixture composed of two or more substances
  6. 16. Best or ideal
  7. 17. Feels Cold. Energy enters the reaction system. Energy flows from the surroundings into the reaction system.
  8. 20. When individual water molecules on the surface of a liquid gain enough motion energy to leave the liquid and become a gas.
  9. 21. When water vapor becomes liquid.
  10. 22. The new substance that is produced from a chemical reaction.
  11. 23. When a liquid dissolves in a liquid, the solid breaks apart into particles too small to see and it mixes completely in the liquid.
  12. 24. A group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided.
Down
  1. 1. When something has the ability to dissolve.
  2. 3. Consequences. The many possible changes that happen as a result of making a planned change.
  3. 4. What a design needs to meet to be considered successful.
  4. 5. Made of one type of material throughout.
  5. 6. A systematic series of investigations planned to answer specific questions.
  6. 8. When one decision directly affects another decision, and you can’t do both things.
  7. 11. Substance made up of different elements joined together by a chemical bond
  8. 12. What holds atoms together in molecule
  9. 13. A physical model built to try out and test.
  10. 14. The work we do to make our solution the best or ideal.
  11. 18. Entities like people, groups or things that are impacted by design decisions.
  12. 19. A blend of two or more substances.