Earth History Review

Front

What is a fossil?

Back

Remains or impression of an organism preserved in petrified rock.

Front

Why are marine fossils found in desert rock layers?

Back

The area was once completely covered by water.

Front

What does an index fossil represent?

Back

A species that lived during a short interval of Earth's history.

Front

What is true about the movement of Earth's crust along a fault line?

Back

Different types of movement occur along different types of faults.

Front

What are Paleozoic, Mesozoic, and Cenozoic?

Back

They are all Eras in Earth's history.

Front

What is the definition of an era in geological time?

Back

A major division of geological time that is subdivided into periods.

Front

What is continental drift?

Back

The movement of the Earth's continents relative to each other.

Front

What is the significance of index fossils in geology?

Back

They help to date rock layers and understand the relative ages of fossils.

Front

What is the difference between a period and an era?

Back

A period is a subdivision of an era in geological time.

Front

What is an example of a catastrophic event that can affect Earth's geology?

Back

A meteor impact, volcanic eruption, or massive earthquake.