A Trip Through Geologic Time

Magma that forces its way into rocks and hardens is called a (n)

• extrusion

• fault

• unconformity

• intrusion

A petrified fossil forms when

• an organism is frozen

• minerals replace all or part of an organism

• an organism becomes trapped in amber

• gases escape from the organism and leave carbon behind

The earliest forms of life appeared during the

• Paleozoic Era

• Cenozoic Era

• Precambrian Time

• Mesozoic Era

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NGSS.MS-LS4-1

On the geologic time scale, eras are divided into

• ages

• indexes

• periods

• relative dates

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NGSS.MS-ESS1-4

Fossils provide evidence for all of the following EXCEPT for

• changes in Earth's surface

• how Earth originally formed

• how environments on Earth changed over time

• how groups of organisms have changed over time

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NGSS.MS-ESS1-4

NGSS.MS-ESS2-3

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In the Cambrian Explosion

• the supercontinent broke apart

• an asteroid collided with Earth

• a great number of different organisms evolved

• mammals spread onto every continent on Earth

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

Most fossils form when organisms die and are buried in

• sediment

• faults

• unconformities

• ice

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

The Mesozoic Era is often called the

• Age of Mammals

• Age of Fish

• Age of Reptiles

• Age of Amphibians

Scientists use radioactive dating to

• determine the absolute age of rocks

• discover the source of index fossils

• determine the relative age of extrusions

• find trace fossils in igneous rocks

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NGSS.HS-ESS1-5

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Reptiles evolved from

• dinosaurs

• mammals

• birds

• amphibians

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NGSS.MS-LS4-2