2. Matter and Its Properties
   
   1. a) What is the main difference between physical properties and chemical properties?
      b) Give two examples of each.
      
   2. Classify each of the following as either a physical change or a chemical change.
      a) tearing a sheet of paper
      b) melting a piece of wax
      c) burning a log
      
   3. You are given a sample of matter to examine. How do you decide whether the sample is a solid, liquid, or gas?
      
   4. Contrast mixtures with pure substances.
      
   5. a) Define mass.
      b) Define volume.
      
   6. a) Define property.
      b) How are properties useful in classifying materials.
      
   7. What is the difference between extensive properties and intensive peroperties?
      
   8. a) Define physical properties.
      b) List three examples of physical properties.
      
   9. a) Define chemical properties.
      b) List three examples of chemical properties.
      
   10. What is meant by a change in state?
       
   11. Identify each of the following as either a physical change or a chemical change. Expain your answers.
       a) A piece of wood is sawed in half.
       b) Milk turns sour.
       c) Melted butter solidifies in the refrigerator.
       

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