geologic time scale

In which era, did the human being appear and develop?

• cretaceous

• quarernary

• precambian

• carboniferous

In which era did the first forms of life appear?

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Jurassic period is part of ________ era.

There are 3 main eras. Those are:

• Paleozoic, mesozoic, creataceus

• quaternary, jurassic, cambrian

• paleozoic, mesozoic, cenozoic era

• cenozoic, mesozoic, carboniferus

How old is the Earth?

• 5.6 billions years old

• 4,7 millions years old

• 3.5 million years old

• 4.6 billions years old

The time spans is called ______

Eons are divided into:

• era

• period

• epochs

• all above

What is the earliest stage of the Earth's history?