If you had 1000 atoms of parent isotope, then how many parent atoms would you have after 2 half-lives?

• 75 atoms

• 250 atoms

• 500 atoms

• 125 atoms

Tags

NGSS.HS-PS1-8

If the half-life of a radioactive group of atoms is 100 years, then how old is the rock if there 12.5% parent isotope left?

• 50 years

• 100 years

• 200 years

• 300 years

Tags

NGSS.HS-PS1-8

If you had 1000 atoms of parent isotope, then how many parent atoms would you have after 3 half-lives?

• 75 atoms

• 250 atoms

• 500 atoms

• 125 atoms

Tags

NGSS.HS-PS1-8

If the half-life of a radioactive group of atoms is 100 years, then how old is the rock if there 25% parent isotope left?

• 50 years

• 100 years

• 200 years

• 300 years

Tags

NGSS.HS-PS1-8

The statement that the oldest layer will be at the bottom in an undisturbed sequence of rock layers is called the Principle of ....

• Inclusions

• Unconformities

• Cross-Cutting Relationships

• Superposition

Tags

NGSS.MS-ESS1-4

What are the relative ages of the features in order from oldest to youngest?

• Limestone, Basalt, Fault, Siltstone

• Siltstone, Fault, Basalt, Limestone

• Limestone, Fault, Basalt, Siltstone

• Limestone, Siltstone, Fault, Basalt

Tags

NGSS.MS-ESS1-4

Which of the following correctly lists the layers in order from oldest to youngest?

• A, B, C, D, E

• E, B, C, D, A

• E, D, C, B, A

• C, B, A, D, E

Tags

NGSS.MS-ESS1-4

Which of the following is the oldest?

• Layer L

• Intrusion D

• Intrusion H

• Layer E

Tags

NGSS.MS-ESS1-4

Which layer is OLDER? Fault E or Intrusion D?

• Fault E

• Intrusion D

Tags

NGSS.HS-ESS1-5

Used to determine whether an object is older or younger than other objects

• Superposition

• Relative Dating

• Fossil

• Unconformity