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Geologic Time Exam

Authored by Patricia Brooks-Dickens

Science

9th Grade

NGSS covered

Used 2+ times

Geologic Time Exam
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8 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which concept states that most sediments are deposited in layers that are flat and parallel to Earth's surface?

principle of superposition

cross-cutting relationship

dynamic equilibrium

original horizontality

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Sedimentary rock layers A through D in the cross section below have not been overturned. Which rock layer is the oldest?

A) A

B) B

C) C

D) D

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which radioactive element would a scientist most likely have used to date the age of a fossil that is 10,000 years old?

potassium-40

carbon-14

uranium-238

rubidium-87

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Approximately how long ago did the first dinosaurs appear on Earth?

66 million years ago

187 million years ago

230 million years ago

374 million years ago

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The absolute age of an igneous rock can best be determined by

A) comparing the amounts of decayed and undecayed radioactive isotopes in the rock

B) comparing the sizes of the crystals found in the upper and lower parts of the rock

C) examining the rock's relative position in a rock outcrop

D) examining the environment in which the rock is found

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

One reason why carbon-14 was used to determine the age of the woolly rhinoceros tooth was because carbon-14

A) never completely decays

B) has a very long half-life

C) can be found in most organic remains

D) is easily identified in Carboniferous bedrock

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When did the earliest humans appear on Earth?

before the earliest dinosaurs

before the earliest flowering plants

during the Pleistocene Epoch

during the Late Triassic Epoch

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