Unit #5 Fossil Record

Front

What is a cast in the context of fossils?

Back

A cast is a replica of an organism that forms when sediment fills a mold of the organism.

Front

Which layer is considered the oldest in geological terms?

Back

Layer E is considered the oldest layer.

Front

What is relative dating?

Back

Relative dating is a method used to determine the age of an object by comparing it to other objects.

Front

What does a paleontologist study?

Back

A paleontologist studies fossils.

Front

What is an unconformity in geology?

Back

An unconformity is a break in the geologic record that occurs when rock layers are eroded over time.

Front

What is the Law of Superposition?

Back

The Law of Superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest are at the top.

Front

What is a mold in fossil formation?

Back

A mold is a hollow impression of an organism that forms in sediment.

Front

What is the significance of fossil records?

Back

Fossil records provide evidence of past life and help scientists understand the history of life on Earth.

Front

What is the difference between a mold and a cast?

Back

A mold is an impression of an organism, while a cast is a replica formed when sediment fills the mold.

Front

What is the purpose of stratigraphy in geology?

Back

Stratigraphy is used to study rock layers and layering, helping to understand the chronological sequence of geological events.