Geologic Time Scale

Front

The largest division of the geologic time scale is the

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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.

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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?

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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? Options: Mesozoic Era, Holocene Epoch, Cenozoic Era, Cambrian

Back

Cenozoic Era