Earth's History: Geologic Time and Fossils

The age of a rock given as the number of years since the rock formed.

• relative age
• half-life
• absolute age
• radioactive decay

Tags

NGSS.HS-ESS1-5

The age of a rock compared to the ages of other rocks.

• relative age
• half-life
• absolute age
• radioactive decay

Tags

NGSS.MS-ESS1-4

Preserved remains or traces of an organism that lived in the past.

• vertebrate
• carbon film
• invertebrate
• fossil

Tags

NGSS.MS-LS4-1

A record of the geologic events and life forms in Earth's history.

• index fossil
• half-life
• radioactive dating
• geologic time scale

Tags

NGSS.MS-ESS1-4

A gap in the geologic record that shows where rock layers have been lost due to erosion.

• extrusion
• unconformity
• intrusion
• law of superposition

Which letter matches with the OLDEST layer of rock?

• W

• X

• Y

• Z

Tags

NGSS.MS-ESS1-4

What kind of rock would you typically find fossils in?

• igneous

• metamorphic

• sedimentary

Tags

NGSS.MS-LS4-1

Index fossils are used by geologists to

• match rocks of the same age in different regions

• determine the relative age of rocks in one place

• identify organisms that did not leave fossil evidence behind

• determine why some organisms became extinct

What kind of dating is used to compare the age of a rock to those around it?

• Radiometric (absolute)

• Relative

Which layer is a result of an igneous intrusion?

• B
• C
• D
• E