Fossils

A fuel formed from the remains of once living things is a______?

• fossil fuel

• fossil

• index fossil

• cast

The remains or traces of a plant or animal that lived long ago is a __________?

• fossil fuel

• fossil

• mass extinction

• mold

An event that results in the dying off of many species is called a ______?

• fossil

• cast

• mold

• mass extinction

An impression of an organism, formed when sediment hardens around the organism, is call a_______?

• fossil

• fossil fuel

• mold

• cast

A model of an organism, formed when sediment fills a mold and hardens, is an __________?

• cast

• mold

• fossil

• index fossil

A fossil of a type of organism that live in many places during a relatively short time span is called a _____________?

• fossil

• cast

• index fossil

• mold

Mrs. Lebron was collecting fossils. She found one where original material had been replaced by quartz. What type of fossil did she find?

• trace fossil

• carbon film

• petrified wood

• mummified body

Oil and natural gas start out as tiny sea organisms. Over time, their remains change so that eventually only two elements are left. Which two elements make up oil and natural gas?

• carbon and oxygen

• carbon and hydrogen

• oxygen and hydrogen

• hydrogen and gas