Which fossil is the youngest?

Uses the decay of radioactive elements to find the ___________________________ of a rock or fossil.

These specialized fossils indicate to geologists the boundaries in geological time and determine the age of rocks.

This chronological time chart is broken into different time chunks, the largest being the Eon, then Era, Period, and Epoch.

History of life as documented by all fossils, preserved in sedimentary rock strata is known as the _________________________.

Preserved remains of plant and animals from the remote past are called _______________.

The end of life for a group of organisms, usually a species, is called a(n) ________________.

What division of time was the longest ?

What era did dinosaurs go extinct ?

Paleozoic, Mesozoic & Cenozoic are all

Time unit in the geological time scale smaller than a period, measured in hundreds of thousands to millions of years

Great explosion of life at the beginning of the era and ends with the largest mass extinction in the history of our planet