Geologic Time Assessment

Front

What do scientists use to help figure out geologic time?

Back

Scientists use rock layers to help figure out geologic time.

Front

What is sedimentary rock?

Back

Rock made from sediment compacted by the weight of sediment layers above.

Front

What is an Index Fossil?

Back

An Index Fossil is a species that lived on Earth for a short period of time, was abundant, and found in many different places, e.g., the trilobite.

Front

What does the law of crosscutting state about faults?

Back

The law of crosscutting states that a fault is younger than the rocks it cuts through.

Front

Which rock layer contains the newest fossils?

Back

The rock layer labeled 'F' contains the newest fossils.

Front

What is the principle of superposition?

Back

In undisturbed rock layers, the oldest layers are at the bottom and the youngest layers are at the top.

Front

What are fossils?

Back

Fossils are the preserved remains or traces of ancient organisms.

Front

What is the significance of the geologic time scale?

Back

The geologic time scale is a system of chronological dating that relates geological strata to time.

Front

What is a fault?

Back

A fault is a fracture in the Earth's crust along which movement has occurred.

Front

What is the difference between relative dating and absolute dating?

Back

Relative dating determines the sequence of events, while absolute dating provides a specific age.