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5 Written Questions

5 Matching Questions

  1. Breathe
  2. you're able to see the changes
  3. Electricity, sound, heat, or light
  4. True
  5. Endothermic reaction
  1. a Energy can also be transfered as __________, _____, ____, or _____.
  2. b TRUE/FALSE?
    Sometimes, endothermic reactions need more energy than they can get from their surroundings?
  3. c What chemical reaction requires energy input?
  4. d you can tell that a chemical reaction is happening because?
  5. e You make use of oxygen, a product of photosynthesis, everytime you _______.

5 Multiple Choice Questions

  1. Chemical reactions always involve changes in ________.
  2. Where does the carbon dioxide come from that we exhale?
  3. How many oxygen atoms do covalent bonds hold together?
  4. Energy can change form, but is never _______ or _______.
  5. occurs when substances go through chemical changes to form new substances

5 True/False Questions

  1. a substance that participates in a chemical reactionWhat is a product?

          

  2. LessIn all exothermic reactions, do products have more or less energy that the reactants?

          

  3. Endothermic & chemicalWhat type of reaction is photosynthesis?

          

  4. HeatIf 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. A substance that forms in a chemical reactionWhat is a reactant?

          

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