Slide 1Geologic History Slide 2 Geologic Time Scale Slide 3 Chart of Earths history showing events, time units, & ages Era: the four largest subdivisions of the geologic…

Slide 1Geologic Time Slide 2 How much time ? Slide 3 Determining geological ages Relative age dates – placing rocks and events in their proper sequence of formation Numerical…

Slide 1 Slide 2 1.Archaeologists use the half-life of _____ to date organic materials. A.carbon-12 C.carbon-14 B.uranium-235 D.uranium-238 Slide 3 2.Radioactive materials…

Slide 1Relative Dating of Rocks Slide 2 Relative Dating and the Law of Superposition Relative dating is determining the age of a rock or geologic event when comparing it…

Slide 1LEQ: How do geologists and paleontologists determine the relative age of rocks? Part 1 Key Terms: Absolute Age, Relative Age, Law of Superposition, 1 Slide 2 Absolute…

Slide 1Unit A Chapter 2 Views of the Earth’s Past Slide 2 Fossils –Traces or remains of living things They can give us clues into the following Climate: weather conditions…

Slide 1 FOSSILS Clues to the past 1 Slide 2 Page 63 2  Fossils, November 18, 2014 Slide 3 Fossils What is a fossil? (page 297)  Fossils – preserved remains or evidence…

Chapter 8 The Rock Record Chapter 9 The Mesozoic and Cenozoic Eras Chapter 8 The Rock Record Chapter 9 The Mesozoic and Cenozoic Eras 8.1 Determining Relative Age Hutton-Theorized…

Slide 1 Earth and Solar System Formation of the Universe. Big bang is the most commonly accepted theory. 1. Supported by evidence that Galaxies are moving away from one central…

Earthâs History: Fossils and Absolute Age The Big Question: How do we know long life has existed on Earth? Fossils Source: J. C. Carton/Carto/Bruce Coleman, Inc. New York…