Earth's History Definitions 2

index fossil - a fossil of

• widely distributed organisms that lived during extended periods

• widely distributed organisms that lived during only one short period

• narrowly distributed organisms that lived during extended periods

• narrowly distributed organisms that lived during only one short period

period - a unit of geologic time into which

• eras are divided

• epochs are divided

• eons are divided

• millenia are divided

Tags

NGSS.MS-ESS1-4

eras - the three long units of time between

• the past and the present

• the formation of Earth and Precambrian time

• the formation of Earth and the present

• the Precambrian time and the present

Tags

NGSS.MS-ESS1-4

The Law of Superposition - In sedimentary rock layers

• each layer is older than the one above it

• each layer is younger than the one above it

• each layer is older than the one below it

• each layer is relative age

Tags

NGSS.MS-ESS1-4

scientific theory - a well-tested concept that explains

• a wide range of eras

• a wide range of fossils

• a wide range of observations

• a narrow range of fossils

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

absolute age - the age of a rock given in

• approximate time

• geologic time

• a number of years

• eras

lithosphere - Earth's

• life forms, past and present

• geologic history

• record of life forms and events

• solid rocky outer layer

Tags

NGSS.MS-ESS2-1

fault - a break

• between periods

• in the geologic record

• in the lithosphere

• in the fossil record

relative age - giving the age of a rock by telling

• if it is older or younger than other rocks

• if it is from a fault

• if it is from the lithosphere

• if it is from the geologic record

geologic time scale - a record of the geologic events and life forms in

• the fault of a rock

• the index of a fossil

• the superiority of a position

• the history of Earth

Tags

NGSS.MS-ESS1-4