Patterns in fossils and rock formations

Think about the sequence of events of how a body fossil is formed. Which would be the FIRST step in the process?

• Soft tissue decays

• An organism dies

• Bones are replaced by minerals

• A fossil forms

Think about the sequence of events of how a body fossil is formed. Which would be the SECOND step in the process?

• Soft tissue decays

• An organism dies

• Bones are replaced by minerals

• A fossil forms

Think about the sequence of events of how a body fossil is formed. Which would be the THIRD step in the process?

• Soft tissue decays

• An organism dies

• Bones are replaced by minerals

• A fossil forms

Think about the sequence of events of how a body fossil is formed. Which would be the FOURTH step in the process?

• Soft tissue decays

• An organism dies

• Bones are replaced by minerals

• A fossil forms

What evidence is shown in the picture to support the fact that Grand Canyon rocks are examples of sedimentary strata?

• The layers of rock are in horizontal patterns.

• The layers of rock are in vertical patterns.

• The rocks are near a riverbed.

• The rocks have smooth edges.

A scientist claims that dinosaurs became extinct 65 million years ago. What evidence best supports this claim?

• a trace fossil

• horizontal rock patterns

• sediment samples

• a fossil record

Use the information in the time line to answer the questions.

When was the Paleozoic Era?

• 65 MYA

• 650-550 MYA

• 549-250 MYA

• 249-66 MYA

Use the information in the time line to answer the questions.

How long ago did the Saber-toothed cat go extinct?

• 65 MYA

• 550 MYA

• 250 MYA

• 66 MYA

Use the information in the time line to answer the questions.

Which era is the ichthyosaurus from?

• Mesozoic Era

• Paleozoic Era

• Precambrian Era

• Cenzoic Era

Use the information in the time line to answer the questions.

How many years ago was the END of the Paleozoic Era?

• 650 MYA

• 549 MYA

• 250 MYA

• 65 MYA