Fires & CO2 vocabulary

  1.  
    hydrogen is the/an ___________
  2.  
    true or false. CO2 is a compound?
  3.  
    which of these things would make the most friction i f going down a snowy hill or a regular hill
  4.  
    which things are fuel?
  5.  
    a/an ______ uses photosynthesis.
  6.  
    you would extinguish a _____
  7.  
    covalent bonds are______
Answer Key
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Fires & CO2 vocabulary (Answer Key)

  1.  
    hydrogen is the/an ___________
    lightest gas? heaviest gas? invisible gas? gas that's full of odor?
  2.  
    true or false. CO2 is a compound?
    true? false?
  3.  
    which of these things would make the most friction i f going down a snowy hill or a regular hill
    a sled? a book? a match?
  4.  
    which things are fuel?
    gas? oil? books? water? glass?
  5.  
    a/an ______ uses photosynthesis.
    plant? animal? human? gas?
  6.  
    you would extinguish a _____
    fire? an area of water?
  7.  
    covalent bonds are______
    electrons? atoms? Neutrons?

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