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5 Written questions

5 Matching questions

  1. Fuel
  2. Endothermic Reaction
  3. Combustion
  4. Conservation of Matter
  5. Concentration
  1. a The principle stating that matter is not created or destroyed during a chemical reaction
  2. b A reaction that absorbs energy in the form of heat
  3. c A rapid reaction between oxygen and fuel that results in a fire
  4. d The amount of one material in a certain volume of another material
  5. e A material that releases energy when it burns

5 Multiple choice questions

  1. A material that decreases the rate of a reaction
  2. The minimum amount of energy needed to get a chemical reaction started
  3. A short, easy way to show a chemical reaction, using symbols.
  4. A substance that undergoes change in a chemical reaction
  5. A system in which no matter is allowed to enter or leave

5 True/False questions

  1. Open SystemA system in which matter can enter from or escape to the surrounding

          

  2. CatalystA material that increases the rate of a reaction by lowering the activation energy

          

  3. Chemical ChangeA change in which on or more substances combine or break apart to form new substance

          

  4. CoefficientA 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

          

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

          

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