EH Inv. 4 Fossils

Front

What is the principle of superposition in geology?

Back

In undisturbed rock layers, the oldest rocks are found at the bottom, and the younger rocks are on top.

Front

What group of organisms characterizes the Cenozoic Era?

Back

Mammals and humans.

Front

When does geological time start?

Back

When the Earth began.

Front

What does the prefix 'paleo-' mean?

Back

Prehistoric.

Front

How old is the Earth?

Back

4.6 billion years old.

Front

What is a fossil?

Back

A preserved remains or impression of a once-living organism.

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 species.

Front

What is the difference between relative dating and absolute dating?

Back

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

Front

What are index fossils?

Back

Fossils of organisms that were widespread but only existed for a short period, used to date rock layers.

Front

What is the Law of Original Horizontality?

Back

Layers of sediment are originally deposited horizontally under the action of gravity.