Mass extinctions and Fossils

Front

What is a mass extinction?

Back

A mass extinction is when multiple species from all over the earth suddenly go extinct.

Front

How many mass extinction events have occurred in Earth's history?

Back

There have been 5 mass extinction events in Earth's history.

Front

Which layer of rock is likely the youngest?

Back

Layer D is likely the youngest.

Front

What are fossils?

Back

Fossils are traces or remains of organisms that lived long ago.

Front

Why are shell fossils more likely to be found than jellyfish fossils?

Back

Shells have body structures that are likely to be preserved.

Front

What is the principle of superposition in geology?

Back

The principle of superposition states that in undisturbed layers of rock, the oldest layers are at the bottom and the youngest are at the top.

Front

What is an unconformity in geology?

Back

An unconformity is a gap in the geological record that represents a period of erosion or non-deposition.

Front

What type of rock is most likely to contain fossils?

Back

Sedimentary rock is most likely to contain fossils.

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 and changes in the environment.

Front

What are the main causes of mass extinctions?

Back

Main causes of mass extinctions include climate change, volcanic eruptions, asteroid impacts, and habitat destruction.