Geologic Time Scale

Front

The largest division of the geologic time scale is the

Back

eon

Front

The Mesozoic Era was the Age of Reptiles, and the current Cenozoic Era is the Age of

Back

Mammals

Front

The _________ was an era dominated by the dinosaurs

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Mesozoic

Front

The boundaries between _______ seem to coincide with major changes in the life forms present on Earth.

Back

Eras

Front

Fossils are most common in which rock types? Options: sedimentary, igneous, metamorphic, all of these commonly contain fossils

Back

sedimentary

Front

Which of the following is used by geologists to determine the relative ages in a rock sequence? Options: stratigraphy, fossils, cross-cutting relationships, all of these

Back

fossils

Front

What is the definition of Geologic Time Scale?

Back

A record of the geologic events and life forms in Earth’s history

Front

Known as the age of the mammals? Options: Mesozoic Era, Holocene Epoch, Cenozoic Era, Cambrian

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Cenozoic Era

Front

The disappearance of a species.

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Extinction

Front

Known as the age of the mammals?

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Cenozoic Era