The Fossil Record.

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Presentation transcript:

The Fossil Record

Learning Objectives Describe the fossil record Describe the information that relative dating and radioactive dating provide about fossils

Paleontologists Paleontologists - Scientists who study fossils

Fossil Record The fossil record provides evidence about the history of life on Earth. Shows how species have changed over time

How Fossils Form Organism dies Sedimentary rock builds upon the dead organism 3. Weight of sediment layer compresses the lower layer and along with chemical activity, turns the organism into rock

Relative Dating The age of the fossil is determined by comparing its placement with that of fossils in other layers of rock

Radioactive Dating Half-life: Length of time it takes for half of the radioactive atoms to decay The age of a sample is based on the amount of remaining radioactive isotope it contains

YouTube Radiocarbon Dating Instant Egghead

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