history of the earth

A fossil is ____.

• any dead organism

• the preserved remains or traces of an organism

• a perfect copy of a rock

• an unusual type of rock

Tags

NGSS.MS-LS4-1

How do most fossils form?

• Living things die and their remains are buried by sediments.

• The hard parts of an organism dry out in the air

• The soft parts of an organism change to stone.

• Freezing preserves the remains of an organism

A fossil formed when minerals replace all or part of an organism is called a _____.

• mold

• petrified fossil

• cast

• trace fossil

____ can provide clues about the activities of ancient organisms.

• Trace fossils

• Remains preserved in amber

• Carbon films

• Molds and casts

Tags

NGSS.MS-LS4-1

The process by which all the different kinds of living things have changed over long periods of time is called _____.

• sedimentation

• replacement

• deposition

• evolution

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

NGSS.MS-LS4-4

A type of organism that no longer exists on Earth is said to be _____.

• fossilized

• sedimentary

• extinct

• petrified

Tags

NGSS.MS-LS4-1

The relative age of a rock is _____.

• its age compared to the ages of other rocks

• less than the age of the fossils the rock contains

• the number of years since the rock formed

• its age based on how much carbon-14 the rock contains

Tags

NGSS.MS-ESS1-4

The law of superposition states that, in horizontal layers of sedimentary rock, each layer is _____.

• younger than the layer above it and older than the layer below it

• neither older nor younger than the other layers

• older than the layer above it and younger than the layer below it

• always older than any vertical layers

Tags

NGSS.MS-ESS1-4

The fossils of organisms that were widely distributed but only lived during a short period of time are called _____.

• trace fossils

• petrified fossils

• index fossils

• carbon film fossils

Tags

NGSS.MS-LS4-1

Radioactive decay occurs when atoms of an unstable element _____.

• become part of a fossil

• join with atoms of another element

• break down to form atoms of another element

• are exposed to chemical weathering

Tags

NGSS.HS-PS1-8