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5 Written questions

5 Matching questions

  1. Combustion
  2. Conservation of Mass
  3. Chemistry
  4. Coeffecient
  5. Closed System
  1. a The number placed in front of a chemical formula in an equation
  2. b During a Chemical Reaction Matter is not created or destroyed
  3. c A rapid reaction between oxygen and fuel that results in fire
  4. d The study of matter and how matter changes
  5. e Matter is not allowed to enter or leave

5 Multiple choice questions

  1. A material used to decrease the rate of a reaction
  2. The new materials at the end of a chemicle reaction
  3. A Chemical Reaction in which two or more simple substances combine to form a new, more complex substance
  4. Oxygen,Fuel,Heat
  5. Anything that has mass and takes up space

5 True/False questions

  1. Exothermic ReactionA Reaction that releases energy in the form of heat


  2. Chemical Equationa shorthand way to use chemical symbols and numbers to describe a chemical reaction


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


  4. Physical ChangeAny Change that alters the form or appearance of a substance but that doesn't make the substance into another substance


  5. Activation energyThe minimum amount of energy needed to start a chemical reaction


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