E 81, May 16, 2018

Standard:  Obtain, evaluate, and communicate information to understand how rock relationships and fossils are used to reconstruct the Earth’s past.
Learning Target:
Interpret a geologic cross-section and describe how unconformities form, as well as construct an argument applying principles of relative age.
Open:  Complete 21.1 & 21.2 section assessments
Notes 21.1 & 21.2 section assessments, 
half life demonstration