8.e.2.2 Absolute dating Ap's

Which is the most exact method of determining the age of geologic features?

• relative dating

• radioactive/radiometric dating

• analyzing ice core samples

• comparing fossils to living organisms

Carbon14 is involved in which type of dating?

• realtive

• igneous

• metamorphic

• absolute

Which method would be BEST for scientists to 

use to determine the absolute age of a 

Precambrian ignenous rock?

• law of original horizontality

• radiometric dating

• law of superposition

• index fossils

Carbon 14, a radioactive isotope, decays with a half life of approximately 5,730 years. 

Approximately what percentage of carbon 14 originally present in a clam shell will be 

present after 11,460 years?

• 6.25%

• 25%

• 12.5%

• 50%

If the layers have not been disturbed, which best represents their arrangement from bottom to top?

• ZYXW

• WXYZ

• XYWZ

• ZWYX

What can ice cores most accurately 

tell you about Earth’s history for a 

given location?

• the plants that grew at that time

• the animals that lived at that time

• the climate at that time

Which layer of the ice core 

shows the highest concentration of carbon dioxide in the 

atmosphere?

• 3

• 1

• 2

• 4

•What is most likely indicated by high concentrations of dust and ash in an 

ice core?

• EARTHQUAKE

• VOLCANIC ERUPTION

• TSUNAMIS

• TIDAL WAVES

•Which provides the most information for climate studies if trapped in ice 

    cores?

• OXYGEN

• SEDIMENTS

• CARBON DIOXIDE

• BACTERIA

Which part of Earth’s history is best 

shown by analysis of ice cores?

• changes in the amounts of 

       precipitation

• changes in the formation of rock 

       layers

• changes in plant growth

• changes in climate