Do Now - 12/3 - Superposition

Front

What are fossils?

Back

The remains or evidence of once-living organisms.

Front

What does the law of superposition state?

Back

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

Front

Which layer is the youngest in a sequence of rock layers?

Back

The topmost layer.

Front

What can fossils in different rock layers tell us about their ages?

Back

Fossils found in higher layers are generally younger than those found in lower layers.

Front

What is the significance of sedimentary layers in geology?

Back

They provide a record of Earth's history and the evolution of life.

Front

What does it mean if a fossil is found in a lower rock layer?

Back

It is likely older than fossils found in higher layers.

Front

What is an example of a fossil?

Back

A dinosaur bone or a leaf imprint.

Front

How do fossils form?

Back

Fossils form when organisms are buried by sediment and their remains are preserved over time.

Front

What is the relationship between invertebrates and vertebrates in evolutionary history?

Back

Invertebrates evolved into vertebrates.

Front

What evidence do fossils provide about the evolution of animals?

Back

Fossils show that animals evolved bony skeletons after having shells.