Relative Dating

Question 1

A geologist finds four layers of sedimentary rock. She determines that no geologic events have shifted the layers. She labels the layers A, B, C, and D from the top to the bottom.Which statement about these layers is accurate?

Revolt · Accepted Answer

B is younger than D.

Question 2

Which statement explains one reason why unconformities occur?

Revolt · Accepted Answer

No sediment is deposited over a long time.

Question 3

Which feature forms at Earth’s surface from the cooling of lava?

Revolt · Accepted Answer

extrusion

Question 4

The diagram shows horizontal rock layers.

Revolt · Accepted Answer

Layer D is the youngest layer.

Question 5

Which phrase describes the absolute age of a rock?

Revolt · Accepted Answer

is the number of years since it formed

Question 6

The diagram shows horizontal rock layers.

Revolt · Accepted Answer

Layer C is younger than layer A.

Question 7

Which is the first step that geologists must do to compare rock layers at distant locations?

Revolt · Accepted Answer

identify index fossils in one or more layers at one location

Question 8

The image shows sedimentary rock layers with index fossils and a fault.

Revolt · Accepted Answer

Layer 2 and layer 9 are the same relative age.

Relative Dating Answers

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