Fossil review

The preserved remains of a once living animal or plant is a ....

• mineral 
• fossil
• igneous rock 
• clay

Which parts of an organism are more likely to fossilize?

• the soft parts - skin, muscle
• the hard parts - bones, shells, stems
• all parts can become fossilized easily because the organism becomes buried by sediments

A _______ is a hollow area in sediment in the shape of an organism or part of an organism.

• mold
• cast
• petrified fossil
• trace fossil

A dinosaur track, a trail, and burrow are all examples of

• casts
• molds
• trace fossils
• preserved remains

This type of fossil forms when a mold is filled with sand or mud that hardens into the shape of the organism.

• mold
• cast
• trace
• preserved

This type of fossil forms when minerals soak into the buried remains, replacing the remains, and changing them into rock.

• mold
• cast
• petrified
• preserved

This type of fossil forms when entire organisms or parts of organisms are prevented from decaying by being trapped in rock, ice, tar, or amber.

• trace
• preserved
• carbonized
• index

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

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

• F
• E
• B
• A

Which type of dating method can be used on rock layers by applying the Law of Superposition?

• relative dating
• absolute dating
• radioactive dating
• radiometric dating