Absolute vs. Relative

Enables scientist to determine the numerical age of rocks. 

Scientists use C-14 to determine the age of organic materials, which contain abundant carbon. 

Buried surfaces that were once exposed to erosion. 

Bands of alternating light & dark colored sediment of sand, clay, & silt.

Fragments in a rock layer are older than the rock layer.

States the intrusion is younger than the rock it cuts through.

Matching a unique set of rocks in one region to similar rocks in another region.

The science of using tree rings to determine the absolute age.

States that geological processes occurring today have been occurring since Earth formed.

Measuring the length of time it takes for one half of the original isotope to decay. 

In an undisturbed rock sequence, the oldest layer is at the bottom. 

Which evidence justifies the mass extinction at the end of the Permian period?

Which of these is the largest ecosystem on Earth?

Rocks are deposited in a horizontal or near horizontal layer(s). 

When did scattered landmasses on Earth merge into a supercontinent?

Emission of radioactive particles & the resulting change into other isotopes over time. 

Rock layer or sediment layer used as a marker.

What caused the increase oxygen concentration in Earth’s atmosphere during the Precambrian era?

This doesn't allow scientist to accurately date rock layers.

When scientists date an object using radioactive isotopes.