Written by: Stephen Pegler
Thursday, February 22, 2007

1.  Question 1  page 57

2.  Link here page 11
In Libby’s investigation, which variable was controlled (kept the same)?
A. Number of chews
B. Type of gum chewed
C. Mass of gum after chewing
D. Mass of gum before chewing

3.  Link here page 26  Make the sketch of the graph with the labels
 

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