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5 Written questions

5 Matching questions

  1. compound
  2. matter
  3. mixture
  4. heat
  5. chemical change
  1. a a substance formed by the chemical combination of two or more elements in definite proportions
  2. b any substance; has mass and volume
  3. c a change that produces matter with a different composition than the original matter
  4. d the total amount of kinetic energy due to molecular motion in a body of matter
  5. e A combination of two or more substances that are not chemically combined

5 Multiple choice questions

  1. Mass is neither destroyed nor created during ordinary chemical reactions or physical changes
  2. A reaction that ABSORBS energy in the form of heat
  3. characteristic that cannot be observed without altering the substance
  4. not uniform throughout
  5. amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius

5 True/False questions

  1. homogeneousuniform; of the same kind


  2. energycapacity to do work or cause change


  3. heat of vaporizationthe amount of energy required to change 1 g of a solid to a liquid


  4. densitycapacity to do work or cause change


  5. physical constantproperties of pure substances that can be measured and expressed numerically; fp, mp, d, etc.