Radiometric Dating (CK)

While analyzing the bodies of two ancient humans who were known to have lived at the same time, you discover one of the bodies has a slightly greater amount of carbon-14 still remaining. Which conclusion should you draw?

• The individual with more carbon-14 remaining probably ate more plants than the other.
• Carbon-14 decays at different rates in different individuals.
• The body with more carbon-14 remaining died earlier than the other individual.
• All of these

How does carbon-14 enter the food chain and end up in living organisms?

• It is absorbed from the atmosphere by plants.
• It forms spontaneously in living organisms.
• It is inhaled by organisms and incorporated in their bodies.
• It forms inside living organisms from radioactive decay of heavier elements.

Tags

NGSS.HS-LS2-5

The product of the radioactive decay of a parent isotope is know as a _____ isotope.

• Daughter
• Half-Life
• Absolute
• None of these

Tags

NGSS.HS-PS1-8

Suppose most humans have 100 grams of carbon-14. If you determine an ancient human had 25 grams left, how old is it? (Carbon-14 half life is 5730 years)

• 11,460 years old
• 22,920 years old
• 5730 years old
• 17,190 years old.

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

Every atom of carbon-14 in the atmosphere started out as which element?

• nitrogen
• hydrogen
• oxygen
• carbon

Tags

NGSS.HS-PS1-8

Radioactive decay is the process by which an atomic nucleus of an unstable atom loses energy by emitting particles.

• true
• false

Tags

NGSS.HS-PS1-8

A half life is the time it takes for half of the parent isotopes to change into daughter isotopes.

• true
• false

Tags

NGSS.HS-PS1-8

During the process of radioactivity, high-energy particles are emitted by stable isotopes.

• false
• true

Tags

NGSS.HS-PS1-8

A stable isotope that will undergo radioactive decay is known as a parent isotope.

• false
• true

Tags

NGSS.HS-PS1-8