RELATIVE AND ABSOLUTE DATING

The principle that states that younger rocks lie above older rocks if the layers have not been disturbed.

• LAW OF CROSS-CUTTING RELATIONSHIP

• LAW OF LATERAL CONTINUITY

• LAW OF ORIGINAL HORIZONTALITY

• LAW OF SUPERPOSITION

A mass of igneous rock that forms when magma is injected rock and then cools

• FAULTS

• FOLDS

• INTRUSION

• TILT

Tags

NGSS.HS-ESS2-3

How can Scientists establish the relative ages of rocks?

• By using fossils in undisturbed sequence of rocks.

• By studying forces in the earth, such as tilting, folding, faults, and intrusions.

• When the earth's forces move rock layers up or down unevenly, so that the layers are slanted.

Tags

NGSS.HS-ESS1-5

What determines the age of an event or object in years?

• ABSOLUTE DATING

• RELATIVE DATING

• ROMANTIC DATING

Tags

NGSS.HS-ESS1-6

The breakdown of a radioactive isotope into a stable isotope of the same element or of another element. 

• HALF-LIFE

• ISOTOPES

• RADIOACTIVE DECAY

• RELATIVE DATING

Tags

NGSS.HS-PS1-8

Atoms of the same element that have a different number of neutrons.

• Half-life 

• Isotopes 

• Radioactive decay 

• Relative dating 

The average time needed for half of a sample of a radioactive isotope to undergo radioactive decay to form daughter isotopes.

• ISOTOPES

• HALF-LIFE

• RADIOACTIVE DECAY

• RELATIVE DATING

What is Half-life measured in?

• UNITS OF LENGTH

• UNITS OF MASS

• UNITS OF VOLUME

• UNITS OF TIME

Tags

NGSS.HS-PS1-8

Scientists have established a way of determining an age range for rock layers using certain fossils.

• BODY FOSSILS

• CAST FOSSILS

• INDEX FOSSILS

• MOLD FOSSILS

• TRUE FORM FOSSILS

The process of determining whether an object or event is older or younger than other objects or events.

• ABSOLUTE DATING

• RELATIVE DATING