Geological Time

Preserved remains or traces of an organism that lived in the past.

• vertebrate
• carbon film
• invertebrate
• fossil

The Law of Superposition helps scientists to determine what?

• The absolute age of rock layers
• The age of fossils
• The relative age of rock layers
• the super powers of rocks

What type of rock do fossils form in?

• Igneous
• Sedimentary
• Metamorphic
• Classic

According to the law of superposition, which layer is the youngest?

• A
• B
• C

Based on the law of superposition, where would the oldest rocks be found.

• at the bottom

• at the top

• second from the bottom

• second from the top

Which technique can be used to determine the exact age of a rock?

• Radiometric dating

• Relative dating

Which letter matches with the OLDEST layer of rock?

• W

• X

• Y

• Z

_{Which rock layer in the diagram seems to be the oldest?}

• F
• E
• B
• A

Analyze the seashell found in the white layer.  Which statement is true of the rock layer that contains this fossil?

• It could also contain a fossil from the bottom layer.
• It is older than the layers below it.
• It is younger than the layers above it.
• It is older than the layers above it.

Which fossil is the youngest?

• fossil A

• fossil B

• fossil C

• fossils A and B are the same age