Age of the Earth

What does the Law of Superposition say?

• The layer on top is younger than the layer on the bottom

• The layer on the bottom is younger than the layer on the top

• Radioactive isotopes are younger than radioactive

• Rocks cannot be dated after 50 million years

Tags

NGSS.MS-ESS1-4

Radioactive AND Relative dating...

• is quantitative (has numbers)

• Determines the age using the layer's position

• Determines the age using radioactive isotopes

• Provides the order of rock formation

Which layers are correctly paired by age?

• R and II

• P and VI

• R and VI

• P and II

Tags

NGSS.HS-ESS1-5

According to this law, the fault or body of rock that cuts through layers must be YOUNGER than the layers it cuts through.

• Law of Superposition

• Law of Radioactivity

• Law of Crosscutting Relationships

• Law of Inclusion

Tags

NGSS.MS-ESS1-4

Which is true about Absolute Dating?

• Using a radioactive sample to determine the age in years of a sample

• Using a radioactive sample to determine the approximate age of a sample

• Only samples of Carbon-14 can be used

• Only samples of Uranium can be used

According to the Law of Inclusion, rocks with pieces of other rock layers in them must be ________________ than the rock pieces they contain.

• The same age

• Heavier

• Older

• Younger

Tags

NGSS.MS-ESS1-4

Which is the correct order of events? OLDEST TO YOUNGEST

• C, B, A, D, E

• E, D, A, B, C

• B, D, E, A, C

• A, B, C, D, E

Tags

NGSS.HS-ESS1-5

An isotope of dinosaurium has a half life of 200 days. How many days will have passed when 50% of a sample of dinosaurium sample remains?

• 120

• 60

• 200

• 240

The graph shows the decay of radioactive isotopes. What approximate amount of the element remains after 2 half-lives have elapsed

• 50%

• 25%

• 12.5%

• 6.25%

Tags

NGSS.HS-PS1-8

Plutonium-244 has a half life of 40 million years. You determine the same to be 80 million years old. What percentage of the isotope REMAINS?

• 100%

• 50%

• 25%

• 12.5%

Tags

NGSS.HS-PS1-8