Standards
National Standards 5-8
Content Standard D: Earth's History
Fossils provide important evidence of how life and environmental conditions have changed.
National Standards 9-12
Content Standard D: The Origin and Evolution of the Earth System
Geologic time can be estimated by observing rock sequences and using
fossils to correlate the sequences at various locations. Current methods
include using the known decay rates of radioactive
isotopes present in rocks to measure the time since the rock was formed.
You may want to look at the entire National Science Education Standards.
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