Geologic Time

Front

What is the name of the large supercontinent where all the continents were joined together?

Back

Pangaea

Front

Who first proposed the idea of Continental Drift?

Back

Alfred Wegener

Front

What does the Geologic Time Scale record?

Back

The known history of rocks and fossils.

Front

Is the fossil record complete?

Back

No, the fossil record is incomplete.

Front

What is the significance of fossils in understanding Earth's history?

Back

Fossils provide evidence of past life and help scientists understand the evolution of organisms.

Front

What are the two main types of fossils?

Back

Body fossils and trace fossils.

Front

What is a body fossil?

Back

A body fossil is the preserved remains of an organism, such as bones or shells.

Front

What is a trace fossil?

Back

A trace fossil is evidence of an organism's activity, such as footprints or burrows.

Front

What is the principle of superposition in geology?

Back

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

Front

What are eras in the Geologic Time Scale?

Back

Eras are large divisions of time that are used to organize the history of Earth.