Unit 2 Earth's History

A geologist discovered a fossil in a layer of rock. This fossil is an index fossil. What can he determine from this fossil?

• the age of the rock

• a volcanic eruption

• the type of rock

• the water in the rock

Tags

NGSS.MS-ESS1-4

What process involves the comparison of rock layers with others in a sequence to determine if it's older or younger than?

• Radioactive decay

• Relative dating

• Radiometric dating

• Absolute dating

Tags

NGSS.MS-ESS1-4

Erosion is one of the major causes of the missing rock layers, known as

• Superposition

• Geologic Time Scale

• Unconformities

• Tilting

The phrase “younger over older” could be used to remember the principle of

• Superposition

• Absolute dating

• Unconformities

• Geology

Tags

NGSS.MS-ESS1-4

Which of the following do geologists use to help date rock layers?

• Trace fossil

• Index fossil

• Mold

• Cast

Tags

NGSS.MS-ESS1-4

Which of these choices names two kinds of trace fossils?

• Footprints and droppings

• Shells and bones

• Bees and beetles in amber

• Petrified or mummified fossils

According to scientists Earth is approximately 4.6 billion years old. How do scientists determine that?

• By measuring the age of the oldest glacier

• By using radiometric dating techniques on meteorites

• By guessing the age of the oldest fossils

• By determining the chemical composition of sea-floor sediments

Tags

NGSS.MS-ESS1-4

_____ is when lava hardens on the surface of Earth.

• A) Intrusion

• B) Extrusion

• C) Unconformity

• D) Tilting

The four different divisions of time in the geological time scale beginning with the largest division are

• Eon, Era, Period, Epoch

• Era, Eon, Epoch, Period

• Period, Era, Eon, Epoch

• Epoch, Period, Era, Eon

Tags

NGSS.MS-ESS1-4

What age was each era known as?

Tags

NGSS.MS-ESS1-4