Absolute Age of Rocks Review

Which type of rock can geologists determine the absolute age of?

• igneous

• sedimentary

• metamorphic

Tags

NGSS.HS-ESS1-5

In order to find the absolute age of a rock, geologists look for minerals called zircons, which can be found in which type of rock?

• sedimentary

• igneous

• metamorphic

Which of the following is the oldest?

• Layer L

• Intrusion H

• Intrusion D

• Layer E

Tags

NGSS.MS-ESS1-4

Which is an example of absolute age?

• This trilobite is older than that dinosaur.

• That stromatolite is the absolute oldest fossil I've ever seen.

• Velociraptors lived 71-75 million years ago.

• The oldest sedimentary layer is on the bottom.

How old is a fossil with 30% Carbon-14?

• 10,000 years

• 15,000 years

• 20,000 years

• 25,000 years

What isotope is being used on this graph?

• Carbon- 11

• Carbon- 12

• Carbon- 13

• Carbon- 14

Tags

NGSS.HS-PS1-8

How old is fossil with 80% carbon-14?

• 1,000 years

• 2,000 years

• 3,000 years

• 4,000 years

How old is a fossil with 40% carbon-14?

• 2,000 years

• 4,000 years

• 8,000 years

• 10,000 years

Which method is commonly used to determine the absolute age of igneous rocks?

• Radiometric dating

• Stratigraphy

• Fossil correlation

• Magnetic polarity

What is the principle behind radiometric dating?

• Decay of radioactive isotopes

• Layering of sedimentary rocks

• Magnetic field reversals

• Fossil succession