Geologic Time Answers

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How are eras and periods of the geologic time scale named?

They are named for the places where geologists first described rocks or fossils from that time.

Their names are based on the names of scientists who discovered the rocks and fossils.

They are named after plants and animals that lived during that time.

Their names are based on the number of centuries within that length of time.

oceansfossilsthe atmosphere

oceans

fossils

the atmosphere

PrecambrianPaleozoicCenozoic

Precambrian

Paleozoic

Cenozoic

According to scientific evidence, Earth is approximately 4.6 [___] years old.

Answer:

billion

1 2 3 4

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