Geological Time Concepts

Front

Relative age

Back

Age of a rock or fossil compared to others

Front

Absolute age

Back

Exact age of a rock or fossil in years

Tags

NGSS.HS-ESS1-5

Front

Law of superposition

Back

Older layers are found below younger layers

Tags

NGSS.MS-ESS1-4

Front

Fossil

Back

Preserved remains of ancient organisms

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Front

Unconformity

Back

Gap in the geological record

Tags

NGSS.MS-ESS1-4

Front

Radioactive decay

Back

Process of unstable atoms losing energy

Tags

NGSS.HS-PS1-8

Front

Radioactive dating

Back

Method to determine absolute age using isotopes

Tags

NGSS.HS-PS1-8

Front

Relative

Back

Compared to something else

Tags

NGSS.MS-LS4-2

Front

Infer

Back

Draw conclusions from evidence

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

Front

True or False: Radioactive dating can determine relative age.

Back

False

Tags

NGSS.HS-PS1-8