Fossils and Geologic Time

Why is the fossil record incomplete?

• fossils get eroded away over time
• most organisms never became fossils
• scavengers and decomposers eat them too quickly
• all of the above

Which fossil is a replica of the original shape of the organism?

• cast
• mold
• trace
• preserved remains

Which fossil is an impression left by the original organism?

• cast
• mold
• trace
• preserved remains

Relative dating of rock layers tells us that the deeper we dig, _______.

• the younger the rocks get
• the smellier the rocks get
• the harder the rocks get
• the older the rocks get

Which of the following statements about the fossil record is true?

• all organisms become fossils
• organisms having soft body parts make up most of the fossils
• all organisms that have shells become fossils
• the fossil record is incomplete

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 2 things make a good index fossil?

• Good looks and a great smile
• widespread and on Earth of a short time
• widespread and on Earth for a long time
• only found in Kansas City and in every rock layer

A bug stuck in amber is an example of what type of fossil?

• cast
• mold
• trace
• original remains

What type of rock do fossils form in?

• Igneous
• Sedimentary
• Metamorphic
• Classic

 These are dinosaur footprints. What is this a example of?

• All of the below!!!!!
• index fossil
• permineralized  remains
• trace fossil