Unit Test

Question 1

Which statement about how geologists study the ages of rock layers is true?

Revolt · Accepted Answer

The principle of original horizontality provides the basis for the law of superposition.

Question 2

Layers 3 and 5 ✔ Layers 2 and 3Layers 5 and 6

Revolt · Accepted Answer

Layers 2 and 3

Question 3

Layers 1 and 2 ✔ Layers 7 and 9Layers 4 and 6

Revolt · Accepted Answer

Layers 7 and 9

Question 4

Which happened first?

Revolt · Accepted Answer

Letter F was deposited.

Question 5

Layer 2 Layer 4 ✔ Layer 8

Revolt · Accepted Answer

Layer 8; Selection 1: Layer 8; Selection 2: Layers 2 and 3; Selection 3: Layers 7 and 9

Question 6

Geologists use tools other than the law of superposition to help them with relative dating. Which statements describe those tools? Check all that apply.An unconformity is created when lava pours out on Earth’s surface.Faults are the result of volcanic activity.Intrusions and extrusions are sedimentary formations.Cross-cutting features are always younger than the surrounding rock.When material erodes before sediment is deposited on it, a geologic gap results.

Revolt · Accepted Answer

Cross-cutting features are always younger than the surrounding rock.; When material erodes before sediment is deposited on it, a geologic gap results.

Question 7

✔ intrusionextrusionfault

Revolt · Accepted Answer

intrusion; Letter H is a(n) .: intrusion; Which of these is youngest?: Letter G; Which of these was eroded?: Letter F; Which happened first?: Letter F was deposited.

Question 8

K, E, Q, W, B✔ B, W, E, Q, KB, Q, W, E, KK, E, W, Q, BB, W, E, K, Q

Revolt · Accepted Answer

B, W, E, Q, K

Question 9

ABC✔ D

Revolt · Accepted Answer

D; Selection 1: D; Selection 2: B and C; Selection 3: A

Question 10

Which statements about this diagram are true? Check all that apply.

Revolt · Accepted Answer

Faulting created the differences in layers.; Layers 2 and 9 are the same age.

Unit Test Answers

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