PS Unit 2: Chemical Reactions

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Across
  1. 3. A state of matter similar to gas but consisting of positively charged ions and free electrons.
  2. 5. The formation of gas bubbles in a liquid by a chemical reaction.
  3. 6. A characteristic of a substance that can be observed or measured without changing its identity.
  4. 8. A state of matter characterized by particles arranged such that their shape and volume are relatively stable.
  5. 10. A solid that forms and settles out of a liquid mixture.
  6. 11. A chemical reaction in which one element is substituted for another element in a compound.
  7. 15. A state of matter without a definite shape or volume.
  8. 18. A substance that is formed as the result of a chemical reaction.
  9. 20. A chemical reaction that occurs when a substance reacts with oxygen, releasing energy in the form of light or heat.
  10. 21. A process or reaction that absorbs energy in the form of heat.
  11. 22. A characteristic of a substance that describes its ability to change into different substances.
  12. 23. The process of changing or causing something to change from one form to another.
  13. 24. The speed at which a chemical reaction proceeds.
  14. 25. A chemical reaction where one substance breaks down into two or more simpler substances.
Down
  1. 1. Anything that has mass and takes up space.
  2. 2. A substance that takes part in and undergoes change during a reaction.
  3. 4. A chemical reaction in which two or more simple substances combine to form a more complex product.
  4. 7. The digits in a measurement that are known with certainty plus the first digit that is uncertain.
  5. 9. A state of matter with a definite volume but no definite shape.
  6. 12. A principle stating that if a system at equilibrium is subjected to a change in concentration, temperature, or pressure, the system will adjust to partially counteract the effect of the change.
  7. 13. A chemical reaction where two compounds exchange ions or bonds to form different compounds.
  8. 14. A change that produces matter with a different composition than the original matter.
  9. 16. A change in a substance that does not involve a change in the identity of the substance.
  10. 17. A process or reaction that releases energy in the form of heat.
  11. 19. The mass of a substance per unit volume.