Directions:  Answer the following questions on a separate piece of paper.  For all open-ended questions, you must answer in a complete sentence.  All math questions must show work including appropriate units and significant figures.

2.1 The Nature of Matter: # #3, 5, 6, 7, 25, 27

2.2 Properties of Matter:  #8-9 (write term only) , 10, 11, 12, 13, 14, 24, 28-29 (write term only)

2.3 Classifying Matter: # 16, 17, 18, 21, 23