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Physical vs. Chemical Change  

created by Simmy8 on 21 Jun 12
Medium level (78% of success)    10 questions - 4 523 players
Classify the following as examples of a physical change, a chemical change or both.
 
1
Wood rots
   
   
   
2
Sodium hydroxide dissolves in water
   
   
   
3
Milk sours
   
   
   
4
Hydrochloric acid reacts with sodium hydroxide to produce a salt, water, and heat
   
   
   
5
Acid on limestone produces carbon dioxide gas
   
   
   
6
A pellet of sodium is sliced in two
   
   
   
7
Iron rusts
   
   
   
8
Water is heated and changed to steam
   
   
   
9
Ice melts
   
   
   
10
Potassium chlorate decomposes to potassium chloride and oxygen gas
   
   
   
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8 March 16