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5 Written questions

5 Matching questions

  1. Chemistry
  2. Chemical Property
  3. Synthesis
  4. Endothermic Reaction
  5. Combustion
  1. a A characteristic of a pure substance that describes its ability to change into a different substance
  2. b The study of the properties of matter and how matter changes
  3. c A chemical reaction in which two or more simple substances combine to form a new, more complex substance
  4. d A reaction that absorbs energy in the form of heat
  5. e A rapid reaction between oxygen and fuel that results in a fire

5 Multiple choice questions

  1. A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in the reaction
  2. A chemical reaction that breaks down compounds into simpler products
  3. The amount of one material in a certain volume of another material
  4. A system in which no matter is allowed to enter or leave
  5. A material that increases the rate of a reaction by lowering the activation energy

5 True/False questions

  1. Chemical EquationA short, easy way to show a chemical reaction, using symbols.

          

  2. PrecipitateA solid that forms from a solution during a chemical reaction

          

  3. EnzymeA biological catalyst that lowers the activation energy of reactions in cells

          

  4. Activation EnergyA material that decreases the rate of a reaction

          

  5. ReplacementA substance that undergoes change in a chemical reaction