SCIENCE: History of the Earth Review

Front

What is amber?

Back

Amber is tree sap that has hardened and been replaced by minerals, often containing ancient organisms.

Front

What are fossils?

Back

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

Front

What is the geologic time scale?

Back

The geologic time scale is a method of organizing Earth's history into different time periods.

Front

What are epochs in the geologic time scale?

Back

Epochs are divisions of periods in the geologic time scale, representing significant time intervals.

Front

How was the geologic time scale created?

Back

The geologic time scale was created by measuring the age of rocks and fossils to organize Earth's history.

Front

What is petrified wood?

Back

Petrified wood is wood that has turned into stone through the process of mineralization.

Front

What is a mold fossil?

Back

A mold fossil is a hollow impression left in sediment that reflects the shape of an organism.

Front

What is an imprint fossil?

Back

An imprint fossil is a mark or impression left by an organism in soft sediment that later hardens.

Front

What is the difference between a fossil and a rock?

Back

Fossils are remains or traces of living organisms, while rocks are solid mineral materials.

Front

What is the significance of studying fossils?

Back

Studying fossils helps scientists understand the history of life on Earth and how organisms have evolved.