Geologic History Review

Rock layers were found containing 50 kg of radioactive elements that had a half life of 2 million years. How OLD were the rock layers if scientists determined that the ORIGINAL sample had 400 kg?

• 6 million days

• 8 million years

• 4 half lives

• 6 million years

Tags

NGSS.HS-PS1-4

The original element that undergoes radioactive decay is known as the...

• daughter element
• half-life
• parent element
• carbon-14

Tags

NGSS.HS-PS1-8

Which describes the best use of Carbon-14 in collecting geologic evidence?

• to date organic material less than 70,000 years old

• to compare the decay of uranium to lead

• to identify index fossils

• to date sedimentary rock layers

Which of the following places the geologic time eras in order from oldest to most recent?

• Precambrian, Paleozoic, Mesozoic, Cenozoic
• Mesozoic, Cenozoic, Paleozoic, Precambrian
• Cenozoic, Mesozoic, Paleozoic, Precambrian
• Paleozoic, Cenozoic, Precambrian, Mesozoic

Tags

NGSS.MS-ESS1-4

How is radioactive decay used to determine absolute age of a rock?

• We compare the amount of daughter and parent isotopes in the sample.

• We compare the half lives of the parent and daughter isotopes.

• We measure the amount of fossils left over in a sample.

• We can't measure the age of the rock samples. The technology isn't there yet.

Tags

NGSS.HS-PS1-8

NGSS.HS-ESS1-5

How is an igneous intrusion formed?

• Magma cuts through rock, cools and hardens

• It is deposited as layers

• By lots of heat and pressure

• It is weathered and eroded

Tags

NGSS.HS-ESS2-3

Radiometric dating is possible because the half-life of a radioactive isotope ___________ for that isotope.

• change over time

• change from place to place

• is constant

• vary widely

Tags

NGSS.HS-PS1-8

How does sedimentary rock usually form?

• Vertically
• Diagonally
• Folding
• Horizontally

Tags

NGSS.HS-ESS2-5

Which happened first? Fossil Fuel Formation or Largest Mass extinction

• Fossil Fuel Formation

• Largest mass extinction

What is the order of the events from oldest to youngest?

• A, M, E, L, C, S, H, D

• A, M, E, L, D, H, C, S

• S, C, D, L, H, E, M, A

• A, M, E, H, L, D, C, S

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1