1/23/12

Science Starter
1. What does the principle of uniformitarianism state?
2. A(n) ______ is a gap in the geologic record.


TURN IN:  
Steno/Douglass if you didn't do it online


Classwork: 
Chapter 26 Discussion


HW: 
All - Paleozoic Era/Precambrian Time Worksheet
Honors - Online Activity (Week of Jan 23 - Origin of Oxygen/The Dating Game)