Fossils

When the last of its kind dies, a species is _________________.

• endangered

• extinct

• fossil

• cast

Tags

NGSS.MS-LS4-1

The remains or traces of a plant or animal that lived long ago is a _____________________.

• fossil

• mass extinction

• mold

• cast

An event that results in the dying off of many species is called _______________________________

• threatened species

• index fossils

• molds

• mass extinction

An impression of an organism, formed when sediment hardens around the organism is called a _________________________.

• cast

• mold

• fossil

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

• cast

• mold

• fossil

A fossil is a type of organism that lived in many places during a relatively short time span is called a(n) ____________________________.

• trace fossil

• extinct

• index fossil

• mold

Not every animal or plant becomes a fossil when it dies. Which event BEST helps a fossil form?

• Water washes away dirt

• Animals eat the soft tissues

• Wind blows the dead organism away

• Sediment quickly buries the dead organism

Josh read about a land animal whose fossils were found in similar rock layers in Africa and South America. What can he conclude from his discovery?

• Animal fossils all look alike.

• The landmasses were once joined.

• The animals swam across the ocean.

• The fossils formed in an ocean and washed ashore.

Malaya is collecting fossils. She found one whose original material had been replaced by quartz. What type of fossil did she find?

• trace fossil

• carbon film

• petrified wood

• mummified body

Suppose you found fossils of sharks and other fish in a nearby forest. What could you infer about the area from these discoveries?

• The area was once a desert.

• The area was once an ocean.

• The area was once a forest.

• The area was once an ice field.