Earth's History Practice

Front

Who developed the theory of continental drift?

Back

Alfred Wegener

Front

Which rock layer is typically the oldest?

Back

The bottom layer (Layer A) is usually the oldest.

Front

What is a dinosaur footprint classified as?

Back

A trace fossil.

Front

What forms a subduction zone?

Back

When one tectonic plate sinks below another.

Front

What is a bug in amber classified as?

Back

A true fossil.

Front

What is the process of fossilization?

Back

The process by which organic material is preserved in sediment.

Front

What are the three main types of rocks?

Back

Igneous, sedimentary, and metamorphic.

Front

What is the principle of superposition?

Back

In undisturbed rock layers, the oldest layers are at the bottom.

Front

What is a mold fossil?

Back

A fossil that forms when an organism leaves an impression in sediment.

Front

What is a cast fossil?

Back

A fossil that forms when a mold is filled with minerals.