Index Fossils

To be considered an index fossil, it had to have lived for a relatively short period of time.

• True
• False

Which rock layer most likely contains fossils of the most recently evolved organisms?

• 1
• 2
• 3
• 4

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

Index fossils help determine relative age through correlating rock layers.

• True
• False

Does the picture represent relative or absolute dating?

• relative
• absolute

What is the best reason that fossil #4 is NOT a good index fossil?

• It is not widespread

• it is not short-lived (in numerous layers)

• It is in half of the outcrops

Index fossils CAN tell us the age of a rock layer.

• True
• False

An organism that no longer exists on Earth is called

• Decayed
• Evolved
• Extinct
• Preserved

_{Which rock layer contains the newest fossils?}

• F
• E
• B
• C

According to the law of superposition, the oldest fossils are found 

• At the top of the rock layers
• Near the bottom of the rock layers
• In the middle of the rock layers
• Somewhat near the surface