Radiometric Dating

Carbon dating measures when the organism died because only then does

• Carbon-14 decay to nitrogen-14

• Carbon-14 decay to carbon-12

• Carbon-12 decay to carbon-14

• None of these

Tags

NGSS.HS-PS1-8

In potassium-argon dating method, Potassium-40 has a half-life of approximately:

• 3 billion years

• 6 billion years

• 8 billion years

• unknown

Tags

NGSS.HS-PS1-8

Radiometric dating uses radioactive isobars to get the absolute ages of rocks.

• false

• true

Tags

NGSS.HS-ESS1-5

The radiocarbon dating methods cannot be used to determine the age of materials older than 4,000 years.

• false

• true

Carbon-14 decays to carbon-12 with a half-life of 5,730 years.

• false

• true

Tags

NGSS.HS-PS1-8

Carbon-14, carbon-13, and carbon-12 are example of different ______ of the same element.

• isotopes

• compounds

• products

• neutrons

Tags

NGSS.HS-PS1-8

The half-life Carbon-14 is 5,730 years. How much parent material is left after 5,730 years?

• 75%

• 50%

Tags

NGSS.HS-PS1-8

The absolute age of an igneous rock can best be determined by ...

• comparing radioactive isotopes

• comparing crystal sizes

Which of the following isotopes is commonly used in radiometric dating to date ancient organic materials?

• Carbon-14

• Uranium-238

• Potassium-40

• Thorium-232

Tags

NGSS.HS-PS1-8

What is the principle behind radiometric dating?

• The decay of radioactive isotopes over time

• The accumulation of sediment layers

• The magnetic orientation of minerals

• The fossil content of rock layers

Tags

NGSS.HS-PS1-8