Age of the Earth

The study of tree rings.

• dendrochronology

• ice core

• varves

• half-life

What can scientists study from ice cores?

• volcanic ash

• solar radiation levels

• ocean temperatures

• solar flares

Tags

NGSS.HS-ESS2-4

NGSS.HS-ESS3-5

An organism has 40 grams of Carbon-14. How much Carbon-14 will it have after 1 half-life?

• 20

• 10

• 40

• 5

Tags

NGSS.HS-PS1-8

An organism has 100 grams of Carbon-14. How much Carbon-14 will it have after 3 half-lives?

• 12.5

• 25

• 50

• 5

Tags

NGSS.HS-PS1-8

How could radiometric dating be used to determine the age of a fossilized bone?

• analyzing the bone's DNA sequence

• measuring the ratio of isotopes in the bone

• examining the bone's mineral composition

• comparing the bone's shape to known fossils

What is half-life?

• The time it takes for a substance to reach its maximum stability.

• The time it takes for a substance to decay completely.

• The time it takes for a substance to become radioactive.

• The time it takes for half of a radioactive isotope to decay.

Tags

NGSS.HS-PS1-8