Fossils and Geologic Time

The geologic time scale is subdivided into

• minutes and hours

• decades and centuries

• eras and periods

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NGSS.MS-ESS1-4

Scientists developed the geologic time scale by studying ____________.

• rock layers and fossils

• weather patterns

• ocean currents

• atmospheric conditions

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NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Which major division of geologic time came first?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

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NGSS.MS-ESS1-4

Which period of geologic time occurred most recently?

• Cenozoic

• Mesozoic

• Paleozoic

• Precambrian

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NGSS.MS-ESS1-4

Over time, Earth’s rock hardened and formed land called ____________.

• Earth's crust

• Earth's core

• Earth's mantle

• Earth's surface

The earliest multicelled organisms were

• invertebrates

• land plants

• vertebrates

• bacteria

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

What happened to cause a mass extinction at the end of the Mesozoic Era?

• Earth's environments became warmer and more humid.

• An asteroid hit the earth.

• There was an ice age.

• We don't know.

Evaluate Science in the Media: In a movie where early humans fight dinosaurs, how would you judge the scientific accuracy of that movie?

• Highly accurate

• Somewhat accurate

• Not accurate at all

• Very accurate

A leaf falls into a shallow lake and is rapidly buried in the sediment. The sediment changes to rock over millions of years. Which type of fossil would most likely be formed?

• carbon film

• cast

• preserved remains

• trace fossil

Which of the following organisms lived during the Paleozoic Era?

• dinosaurs

• humans

• amphibians

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NGSS.MS-LS4-1