Geologic History and Fossils

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What period of time are we presently living in?

What is the name of the first period of geologic history?

What epoch do we currently live in?

Which of the following would be classified as a trace fossil?

If a fossil dissolves away, it can leave behind a cavity in the rock called a ____.

Eras of the geologic time scale are divided into _________.

Period on the geologic time scale are subdivided into ______.

Birds first appeared during which of the following eras?