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Eras of time and Earth's history

Study Slideshow

#geologic time #eras #history of earth

What the longest era in Earth's history?

Precambrian

20

Which era is characterized by the presence of small mammals and the appearance of the first birds?

Mesozoic Era

15

Which era do we currently live in?

Cenozoic Era

5

What era did the first fish appear?

Paleozoic Era

15

What era did the first life appear?

Precambrian

20

Which era is known as the Age of Reptiles?

Mesozoic Era

25

Which era means "ancient life"?

Paleozoic Era

10

Which era means "New Life"?

Cenozoic Era

15

Which era did reptiles first appear?

Paleozoic Era

15

Which era means "Middle Life"?

Mesozoic Era

15

When did Pangea first begin to form?

during the Paleozoic Era

25

What happens at the end of each era of time?

mass extinctions or major geologic changes

10

Which era did the first flower appear?

Mesozoic Era

25

During which era did mammals become the dominant species?

Cenozoic Era

5

What was the first life on Earth?

bacteria

20

What is the longest unit of time on the geologic time scale?

eon

5