Use rock layers to put events in order

Question 1

Undisturbed rock layers, listed from the bottom up: E, D, A, B, C. Which layer is the oldest?

• A. E
• B. D
• C. B
• D. A

Question 2

There is a gap in the rock record where some layers have been worn away before new layers formed on top. What is this called?

• A. a dyke
• B. a fault
• C. a fossil
• D. an unconformity

Question 3

Undisturbed rock layers, listed from the bottom up: A, B, E. Which layer is the oldest?

• A. E
• B. B
• C. A

Question 4

Rock layers are found tilted and folded. What does this tell you?

• A. They were laid down tilted
• B. They formed on the Moon
• C. Forces moved the rock after the layers formed
• D. They are igneous rock

Question 5

Undisturbed rock layers, listed from the bottom up: E, D, C, B, A. Which layer is the youngest?

• A. B
• B. D
• C. A
• D. E

Question 6

A crack filled with igneous rock (a dyke) cuts through layers A, B and C. What can you say about its age?

• A. It is older than all three layers
• B. It is younger than all three layers
• C. It is the same age as layer B
• D. Its age cannot be compared

Question 7

Undisturbed rock layers, listed from the bottom up: A, E, C. Which layer is the youngest?

• A. A
• B. E
• C. C

Question 8

There is a gap in the rock record where some layers have been worn away before new layers formed on top. What is this called?

• A. a fossil
• B. a fault
• C. a dyke
• D. an unconformity

Question 9

Undisturbed rock layers, listed from the bottom up: D, B, A, C. Which layer is the oldest?

• A. D
• B. A
• C. C
• D. B

Question 10

A crack filled with igneous rock (a dyke) cuts through layers A, B and C. What can you say about its age?

• A. It is older than all three layers
• B. Its age cannot be compared
• C. It is the same age as layer B
• D. It is younger than all three layers

Question 11

Undisturbed rock layers, listed from the bottom up: E, C, A. Which layer is the youngest?

• A. E
• B. A
• C. C