Ages of rocks & fossils- Chapter 3 Practice

Which rock layer is the youngest?

• L
• M
• N
• P

What is an example of a fossil?

• A rock with an imprint of a leaf.
• A seashell found at the beach.
• A leaf print in a sidewalk.
• A broken piece of a rock.

Which rock layer is the oldest?

• 1
• 2
• 3
• They are all the same age.

Why might a seashell fossil be found in the middle of a desert?

• The fossil was moved there by an animal.
• The fossil was moved there by a human.
• The landscape changed over time.
• It was formed in the desert.

Which fossil formed most recently?

• cow skull
• dinosaur bone
• trilobite
• clamshell

What likely caused the layers to shift?

• volcano
• weathering
• erosion
• earthquake

A scientist says that layers Y and M are the same age. How does he know this?

• They are found in the same type of rock.
• They are the lowest layers.
• They have the same type of fossil.
• They are near each other.

How can you determine the ages of rock layers?

• by looking at the fossils in the layers
• by looking at the types of rock in the layers
• by digging through all of the layers
• by counting the number of fossils

Which layer or layers prove that this area was once covered by water?

• 1
• 2
• 3
• 2 and 3

According to this fossil record. What type of environment was there first?

• land
• lava
• ocean
• forest