Author Question: The first fuels were plant materials. Indicate whether the statement is true or ... (Read 168 times)

sjones

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The first fuels were plant materials.
 
  Indicate whether the statement is true or false

Question 2

Of the following, only ________ is a chemical reaction.
 
  A) melting of lead
  B) dissolving sugar in water
  C) tarnishing of silver
  D) crushing of stone
  E) dropping a penny into a glass of water


kthug

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Answer to Question 1

TRUE

Answer to Question 2

C



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