Earth's History Definitions 1

The age of a rock given as the number of years since a rock formed

• absolute age

• index fossil

• law of superposition

• relative age

A fossil of widely-distributed organisms that lived during only one short period

• absolute age

• index fossil

• law of superposition

• relative age

Tags

NGSS.MS-ESS1-4

The geologic principal that in horizontal rock layers of sedimentary rock, each layer is older than the layer above it and younger than the layer below it

• absolute age

• index fossil

• law of superposition

• relative age

The comparing of one rock's age to the ages of other rocks

• absolute age

• index fossil

• law of superposition

• relative age

A well-tested concept that explains a wide range of observations

• scientific theory

• geologic time scale

• law of superposition

• lithosphere

Earth's solid, rocky outer layer

• scientific theory

• lithosphere

• law of superposition

• geologic time scale

A record of the geologic events and life forms in Earth's history

• scientific theory

• lithosphere

• law of superposition

• geologic time scale

Tags

NGSS.MS-ESS1-4

One of three long period of time between the Precambrian and the Present

• era

• fault

• period

• relative age

Tags

NGSS.MS-ESS1-4

A break or crack in the Earth's lithosphere along which rocks move

• era

• fault

• period

• relative age

One of the units of geologic time into which geologists divide eras

• era

• fault

• period

• relative age

Tags

NGSS.MS-ESS1-4