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5 Written questions

5 Matching questions

  1. Endothermic Reaction
  2. Decomposition
  3. Chemical Equation
  4. Combustion
  5. Enzyme
  1. a A reaction that absorbs energy in the form of heat
  2. b A rapid reaction between oxygen and fuel that results in a fire
  3. c A biological catalyst that lowers the activation energy of reactions in cells
  4. d A chemical reaction that breaks down compounds into simpler products
  5. e A short, easy way to show a chemical reaction, using symbols.

5 Multiple choice questions

  1. A solid that forms from a solution during a chemical reaction
  2. A change in which on or more substances combine or break apart to form new substance
  3. A characteristic of a pure substance that can be observed without changing it into another substance
  4. A system in which no matter is allowed to enter or leave
  5. A material that decreases the rate of a reaction

5 True/False questions

  1. FuelA material that releases energy when it burns

          

  2. Physical ChangeA change in a substance that does not change its identity

          

  3. ChemistryThe study of the properties of matter and how matter changes

          

  4. Open SystemA system in which no matter is allowed to enter or leave

          

  5. Exothermic ReactionA reaction that releases energy in the form of heat

          

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