Sc 7 E 6 3

SC.7.E.6.3

The diagram shows the folding of rock layers that occurs in the process of mountain building.

Which layer in the diagram is the youngest?

a. Layer L

b .Layer M

c. Layer N

d. Layer Q

• a

• b

• c

• d

Tags

NGSS.MS-ESS1-4

SC.7.E.6.3

Fossils provide information about the layers of rock in which they are found. For example, the fish fossil indicates that the sediments in the surrounding rock were deposited in or near a body of water.

What information does the fish fossil provide about the age of the rock layer surrounding it?

a. The rock is younger than the fossil.

b. The rock is older than the fossil.

c. The rock and fossil are the same age.

d. The age of the rock is unrelated to the age of the fossil.

• a

• b

• c

• d

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

SC.7.E.6.3

Fossils are the preserved remains of organisms that lived long ago. According to the law of superposition, the rock layers that contain fossils should be far below Earth’s surface. Which answer best explains why fossils are sometimes found at or near the surface?

a. Fossils are less dense than rock, so they rise to the surface.

b. Fossils are moved to the surface by other organisms.

c. Sedimentary rock layers are relatively soft, and new fossils sink through upper layers into older, deeper layers.

d. Some rock layers with fossils have been exposed because of different processes, such as faulting, folding, and weathering.

• a

• b

• c

• d

SC.7.E.6.3

The rock layers that make up the Grand Canyon range in age from 2 billion to 230 million years. What would a scientist need in order to compare the ages of rocks from two different parts of the canyon?

a. the location of each rock

b. the size and hardness of each rock

c. the size of the crystals that make up each rock

d. the amounts of radioactive elements in each rock

• a

• b

• c

• d

Tags

NGSS.MS-ESS1-4

SC.7.E.6.3

Many features of rocks offer clues to their ages. Which feature does NOT provide information about the age of a rock?

a. the position of the rock relative to other rock layers

b. the size of the crystals that make up the rock

c. the radioactive elements within the rock

d. the fossils found within the rock

• a

• b

• c

• d

Tags

NGSS.MS-ESS1-4