Chapter 13 Review

Match it! Select the correct answer from the pull down...Good luck!

method used to determine how old a rock layer is by comparing it to another rock layer

length of time it takes for half of the atoms of a radioactive element to decay

Total amount of time since the earth was formed

Model of an organism

Trace or remains of an organism preserved in the earth's crust

Process by which original plant or animal parts are replaced with minerals

An element that breaks apart or decays to form other element

Fossil that provides clues to the age of the rock in which the fossil appears