Module 1 Concept 1 Flashcard

Front

What can fossils in various rock layers show about environments over time?

Back

Environments can change over time.

Front

What does the number position of rock layers indicate to us?

Back

The order in which they formed.

Front

What does the presence of fossils in a rock layer indicate about the environment?

Back

The type of organisms that lived there.

Front

What does the fossil in the OLDEST layer tell us about the land?

Back

This land used to have water.

Front

What does the topmost rock layer represent in terms of age?

Back

The newest layer.

Front

What are fossils?

Back

Fossils are the remains or traces of ancient organisms preserved in rock.

Front

Why are fossils important for understanding Earth's history?

Back

Fossils provide evidence of past life and environments.

Front

What is sedimentary rock?

Back

Sedimentary rock is formed from particles of sand, shells, pebbles, and other fragments of material.

Front

How do scientists determine the age of rock layers?

Back

Scientists use relative dating and absolute dating methods.

Front

What is the principle of superposition?

Back

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