Chapter 2&3 Vocabulary .

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Across
  1. 1. mixture a type of mixture in which the substances are evenly distributed and it looks like a single substance
  2. 5. change a change that occurs when some properties of a material change, but the substances in the material stay the same
  3. 8. a change in which a system absorbs energy from its surroundings
  4. 12. Point the temperature at which a substance changes from solid to liquid
  5. 14. the ability of a solid to be hammered without shattering
  6. 16. the state of matter that has neither a definite shape nor a definite volume
  7. 17. the phase change in which a gas changes directly into a solid without first changing into a liquid
  8. 18. a material’s ability to allow heat or electric charges to flow
  9. 20. mixture a type of mixture in which the parts of the mixture are noticeably different from one another
  10. 22. a substance that is made from two or more simpler substances that are chemically combined in a specific ratio
  11. 23. change a reversible physical change that occurs when a substance changes from one state of matter to another
  12. 24. the phase change in which a substance changes from a liquid into a gas or vapor
  13. 26. the smallest particle of an element
  14. 28. a change in which a system releases energy to its surroundings
  15. 29. the phase change in which a substance changes from a solid directly to a gas without changing to a liquid first
Down
  1. 2. a heterogeneous mixture that separates into layers over time
  2. 3. the state of matter that has a definite shape and definite volume
  3. 4. property any characteristic of a material that can be observed or measured without changing the composition of the substance
  4. 5. matter that always has exactly the same composition; an element or compound
  5. 6. a material’s ability to burn in the presence of oxygen
  6. 7. property the ability to produce a change in the composition of matter
  7. 9. a process that separates materials based on the size of their particles
  8. 10. the state of matter in that has a definite volume but not a definite shape
  9. 11. Point the temperature at which a substance boils (changes from a liquid to a gas)
  10. 13. a substance that cannot be broken down into simpler substances
  11. 15. a homogeneous mixture that is transparent and forms when substances dissolve
  12. 19. the phase change from a gas to a liquid
  13. 21. the process that changes a substance from a liquid to a gas at temperatures below the substance’s boiling point
  14. 25. a homogeneous mixture that is opaque
  15. 27. change change that occurs when a substance reacts and forms one or more new substances