Earth is approximately ___________________ years old.
The geologic time scale is broken into __________ that are broken into ______________ that are broken into _______________.
What's relative dating?
The process by which the age of a rock is determined by measuring the amount of radioactive isotopes present in the rock or rock sample
Which era are we currently in?
Which era was the Age of Dinosaurs/Reptiles?
Which era was Age of Invertebrates?
Which of the following has the eras in order from oldest to current?
The law of superposition has to with the idea that
Absolute dating is when
How would a biologist BEST determine the reason for extinction of a species?
A layer of marine fossils is discovered in a desert environment. Which hypothesis best explains the discovery?
The law of superposition is used for _______________ dating and radiometric dating is used for ______________.
How is radioactive decay used to date rocks?
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