Relative and Absolute Age of Rocks

Which of these is the best indication of the relative age of a rock layer?

• The thickness of the layer
• The position of the layer compared to other layers
• The chemical makeup of the layer
• The distance the layer extends over the Earth

The radioactive decay of material can be used to determine the age of fossils. This is called

• complete dating
• absolute dating
• relative dating
• fossil dating

Which area is most likely the youngest sedimentary layer?

• 1
• 2
• 3
• 4

Which area is most likely the youngest?

• 1
• 2
• 3
• 4

What percent of the original C-14 is left after 11,480 years.

• 1
• 1/2
• 1/4
• 1/8

The method used to tell if one rock layer is older than another
is called —

• complete dating
• fossil dating
• absolute dating
• relative dating

Which is the oldest layer?

• 1
• 2
• 3
• 4

The time is take for half of a radioactive isotopes to decay into stable isotopes is called the

• isotope decay
• radiometric dating
• half life
• absolute age

An element with a different number of neutrons is called a(n)

• atom
• isotope
• neutron deficient
• element

Which would be best for determining the age of dinosaurs?

• Uranium-234
• Lead-214
• Polonium-214
• Thorium-230