Be sure to fill in the blanks during class Unit 3 Looking at fossils, rocks, and single-celled organisms to determine the history of Life Be sure to fill in the blanks during class

CSI: Paleontology Radiocarbon Dating: Relative Dating: Comparing the ratio of stable carbon isotopes (____________________) to unstable ones (carbon-14) to determine age _______________________________________________________________________________________________________________________________________________________________ Remember: all things contain carbon Relative Dating: Age estimate based on location ____________________ Dating: Determines absolute age

Organism trapped in tree resin Amber Preserved

_____________ _____________ _____________ _____________ Natural Cast

Record of activity such as a nest or footprints Trace Fossil

Permineralized Fossil Minerals surround and _____________ _____________ structure Permineralized Fossil

Organisms become encased in materials such as ice or volcanic ash Preserved Remains

Awesome Vocab! Epoch- smallest unit of geological time; lasts several million years Period- _____________________________________________; lasts tens of millions of years Era- longest unit of geological time; consists of two or more periods Paleozoic era- ended with the mass extinction of almost___________________________________; life moved onto land; includes the carboniferous period Cambrian Explosion- earliest part of the Paleozoic era; trilobites _________________________- divided into Triassic, Jurassic, and Cretaceous periods; 1st marsupial mammals; dinosaurs roamed the earth Cenozoic era- continues today; divided into Tertiary and Quaternary periods; ________________________ evolved