History of Life on Earth

How old do Paleontologists believe the Earth is?

• 2015 years old

• 3.6 billion years old

• 4.6 billion years old

• 4.6 million years old

Tags

NGSS.MS-ESS1-4

Paleozoic, Mesozoic & Cenozoic are all

• Epochs

• Eras

• Periods

• Eons

Time unit in the geological time scale smaller than a period, measured in hundreds of thousands to millions of years

• periods

• fossil index

• classification

• epoch

Tags

NGSS.MS-ESS1-4

Great explosion of life at the beginning of the era and ends with the largest mass extinction in the history of our planet

• epoch

• c;lassification

• Paleozoic Era

• relative age

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

These specialized fossils indicate to geologists the boundaries in geological time and determine the age of rocks.

• Index fossils

• Limestone fossils

• Amber fossils

• Cast fossils

Tags

NGSS.MS-ESS1-4

This fossil of a marine animal was found on a mountain, why?

• The mountain was underwater millions of years ago

• The trilobite moved across land

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Which layer would have the oldest fossils?

• Layer 1

• Layer 2

• Layer 3

Tags

NGSS.MS-ESS1-4

Which fossil would make the best index fossil?

• 
• 
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Tags

NGSS.MS-LS4-1

________ are evidence of past life.

• Intrusions

• Fossils

• Meteorites

• Cells

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

How many LAYERS are there?

• 6

• 7

• 5

• 2

Tags

NGSS.MS-ESS1-4