Slide 1GEOLOGIC TIME Slide 2 Rocks Record Earth History Discovering Earths History Rocks record geological events and changing life forms of the past. We have learned that…

Slide 121.3 – Absolute-Age Dating Objectives describe how scientists date rocks and other objects using radioactive elements Explain how scientists can use certain non-radioactive…

Slide 1 Slide 2 Slide 3 James Ussher (mid 1600's) Georges Buffon (mid 1700s) Lord Kelvin (late 1800's) 75,000 yr 100 m.y. Charles Walcott (1893) 75 m.y. 4004 B.C.…

Slide 11 A Tour of the Rock Forming Silicates Slide 2 2 Common Silicates GroupIgneousMetamorphicSedimentary Neso (SiO 4 )Olivine group, Zircon, Topaz Garnet group, Alumnosilicates…

Slide 1 Slide 2 Lesson 3 Reading Guide - KC This principle states that sedimentary layers are originally laid down horizontally. STARTER Relative-Age Dating Slide 3 Lesson…

1.At the bellFilling out your planner and sitting quietly Split a blank piece of paper with a partner Or come grab scrap paper off my desk2. Vocabulary Review Unconformity-Law…

1.Chapter 13:Clues to Earth’s Past2.   3.   4. Paleontologists study fossils and reconstruct the appearance of animals. 5. Fossils: remains, imprints, or traces of prehistoric…

Slide 1Fossils and Radiometric Dating Slide 2 Fossil Formation Fossils: Evidence of Past Life  Fossils: remains or traces of prehistoric life. Only found in sedimentary…

Slide 1 Topic: Evidence for Macroevolution Macroevolution = evolutionary changes over long time spans involving many traits and large genetic changes. The derivation of a…

Slide 1 1 Radiometric determination of age is crucial to understanding geologic time. Radiometric age dating is possible because radioactive decay follows a rate law. What…