ES -Vocab Flashcard

Front

What are cast fossils?

Back

Fossils formed when a mold fossil fills up with sediment.

Front

What is the rock cycle?

Back

The process by which rocks are created, changed from one form to another, destroyed, and then formed again.

Front

What does the law of crosscutting state?

Back

The fault is younger than the rocks it cuts through.

Front

What is a half-life?

Back

The time taken for the radioactivity of a specified isotope to fall to half its original value.

Front

What are carbon fossils?

Back

Remains of plants, animals, and other organisms converted into a carbon or carbon-containing residue.

Front

What are mold fossils?

Back

Fossils that form when an organism leaves an impression in sediment.

Front

What are trace fossils?

Back

Fossils that provide evidence of the activities of ancient organisms, such as footprints or burrows.

Front

What is fossilization?

Back

The process by which organic material is preserved in sedimentary rock.

Front

What is radiometric dating?

Back

A method used to date materials by comparing the abundance of a radioactive isotope to its decay products.

Front

What is extinction?

Back

The end of an organism or a group of organisms, typically due to environmental changes or loss of habitat.