1 / 8

Chapter 15

Chapter 15. Evolution Evidence & Theory. 15-1 The Fossil Record. Nature of Fossils. Fossil Trace of long dead organism Where Found Sedimentary rock How Created Dust, sand, mud deposited by wind/water over dead organisms Develop From Shell, bone, teeth, stem. Types of Fossils. Mold

leontyne-durand
Download Presentation

Chapter 15

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 15 Evolution Evidence & Theory

  2. 15-1 The Fossil Record

  3. Nature of Fossils • Fossil • Trace of long dead organism • Where Found • Sedimentary rock • How Created • Dust, sand, mud deposited by wind/water over dead organisms • Develop From • Shell, bone, teeth, stem

  4. Types of Fossils • Mold • Imprint on rock such as limestone • Shape of organism • Cast • Mold filled with hard minerals • Amber • Fossilized tree sap

  5. Robert Hooke • In 1668 • Concluded fossils are remains of once living plants and animals • What else did he do? Remember way back when… • Hmmm?

  6. Distribution of Fossils • Age • Relative • Steno 1670 Law of Superposition • Determined by fossils position in strata/rock • Oldest fossils = deepest youngest = surface • Absolute • Radioactive dating • Radioactive isotopes • Carbon-14; Carbon-12 • Ratio of decay of carbon-14 to stable carbon-12

  7. Succession of Forms • Extinct • Species no longer exists • Mass Extinction • Period in which large number of species disappear • Biogeography • Study of geographical distribution of fossils & living organisms • Ex of biogeography

  8. Geological History of Earth • Table 15-1 • Era  Period  Epoch • Interactive geologic time

More Related