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Fall 2007  Astr 10  9/20  Lecture 2.2  
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"A friend of mine once sent me a postcard with 
a picture of the entire planet Earth taken from 
space.  On the back it said, 'Wish you were 
here.'"
--Steven Wright 

TODAY: NO PLACE LIKE HOME
Radioactive decay
The lava lamp effect
The cheerleader effect
In-class activity 10 (*.pdf)
     Find and sit in your assigned groups
     Turn in group worksheet
In-class activity 11 preview (*.pdf)
CPS activity: Quiz 4 review
     You must use your own clicker for participation credit

NEXT TIME 
Quiz 4 Announcements
     Tuesday, 9/25, 1:00-1:15 PM
     Closed-book, closed-notes
     Five multiple-choice questions
          (spread out over the four Q4.x learning goals)
     No work needs to be shown; no partial credit
     No scantrons; circle answers directly on Quiz
     **USE YOUR OWN UNIQUE 4-DIGIT P.I.N.**