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5 Written Questions

5 Matching Questions

  1. Many forms of energy.
  2. body
  3. Breathe
  4. Chemical reaction
  5. Energy
  1. a Chemical reactions always involve changes in ________.
  2. b What can be used to break bonds?
  3. c You make use of oxygen, a product of photosynthesis, everytime you _______.
  4. d occurs when substances go through chemical changes to form new substances
  5. e Chemical reactions can take place in your?

5 Multiple Choice Questions

  1. what do most chemical reactions need to get started?
  2. Why is mixing sugar,water, yeast and flour together to make bread dough a chemical reaction?
  3. Energy can also be transfered as __________, _____, ____, or _____.
  4. Describe the atoms that are found in the products & reactants of a reaction.
  5. Energy can change form, but is never _______ or _______.

5 True/False Questions

  1. they undergo chemical reactions and change formWhat chemical reaction requires energy input?

          

  2. Chemical energyoccurs when substances go through chemical changes to form new substances

          

  3. ExothermicAll combustion reactions are __________.

          

  4. TwoCan atoms be created or destroyed in a chemical reaction?

          

  5. Carbon dioxideWhen we exhale, what comes out?

          

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