Geologic Dating Methods

Click the letter that is the youngest layer or event?

Tags

NGSS.MS-ESS1-4

Click the letter that is the oldest layer or event?

Tags

NGSS.MS-ESS1-4

Click the crosscutting feature that is oldest?

Tags

NGSS.MS-ESS1-4

Click on the circle for the angular unconformity.

Tags

NGSS.MS-ESS1-4

Click on the circle for the disconformity.

Tags

NGSS.MS-ESS1-4

Match each relative age dating law with its definition

• Gap in the geological record where rocks are missing

• Superposition

• Younger rocks on top of older rocks

• Original Horizontality

• Sedimentary layers are originally deposited horizontally

• Unconformities

• Geological features that cut through other rocks are younger than the rocks they cut through

• Cross Cutting

Tags

NGSS.MS-ESS1-4

Match the following Absolute Age dating terms with their definitions.

• Atoms formed as a result of radioactive decay

• Parent Atoms

• Unstable atoms that undergo radioactive decay

• Decay Rate

• Time for one radioactive atom to decay

• Half Life

• Time taken for half of the radioactive atoms to decay

• Daugther Atoms

Tags

NGSS.HS-PS1-8

Aria, Harper, and Luna are studying geology and they come across a rock. They discover that the half-life of a radioactive element in the rock is 300 years. If the element has gone through three half-lives, how old is the rock?

• 37.5 years

• 100 years

• 600 years

• 900 years

Tags

NGSS.MS-PS1-5

Noah, Daniel, and Emma are studying about a radioactive group of atoms. They learned that the half-life of this group of atoms is 500 years. They are curious to know, how many half-lives would have passed after 2000 years?

• 1 half-life

• 2 half-lives

• 3 half-lives

• 4 half-lives

Tags

NGSS.HS-PS1-8

Benjamin and Anika are studying radioactivity. They start with 1000 atoms of a certain radioactive isotope. After 1 half-life, how many atoms of the parent isotope would they have left?

• 75 atoms

• 250 atoms

• 500 atoms

• 125 atoms

Tags

NGSS.HS-PS1-8