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5 Written questions

5 Matching questions

  1. No
  2. Endothermic & chemical
  3. When the original substances go through chemical changes and form new substances.
  4. Many forms of energy.
  5. Heat
  1. a What type of reaction is photosynthesis?
  2. b With regards to the reactants, how do you know when a chemical reaction has occured.
  3. c Can atoms be created or destroyed in a chemical reaction?
  4. d What can be used to break bonds?
  5. e If endothermic reactions need more energy than they can get from their surroundings the energy must be added as _______ to cause the reaction to take place.

5 Multiple choice questions

  1. Chemical reactions always involve changes in ________.
  2. Describe the atoms that are found in the products & reactants of a reaction.
  3. A chemical reaction in which energy is released to the surroundings as heat is called ________________.
  4. What is energy that is stored in the form of chemical bonds?
  5. occurs when substances go through chemical changes to form new substances

5 True/False questions

  1. The yeast acts on the sugar to form carbon dioxide & lactic acidWhat is a product?


  2. ProductsWhen enough energy is added to start the isooctane/oxygen reaction new bonds form to make the _______.


  3. LessIn all chemical reactions what stays the same?


  4. you're able to see the changesDescribe the mass at the start & finish of a chemical reaction.


  5. LightWhat do plants use to convert carbon dioxide & water into glucose & oxygen?


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