'Absolute ages' diaporamas de présentation

Chapter 8

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Chapter 26

Chapter 26. The Tree of Life: An Introduction to Biological Diversity. Overview: Changing Life on a Changing Earth. Life is a continuum extending from the earliest organisms to the variety of species that exist today Geological events change the course of evolution

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Chapter 25

Chapter 25. Phylogeny and Systematics. Overview: Investigating the Tree of Life This chapter describes how biologists trace phylogeny The evolutionary history of a species or group of related species. Biologists draw on the fossil record Which provides information about ancient organisms.

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Chapter 26

Chapter 26. The Tree of Life: An Introduction to Biological Diversity. Concept 26.1: Conditions on early Earth made the origin of life possible. Chemical and physical processes on early Earth may have produced very simple cells through a sequence of stages:

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200

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Section 3.1

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Connecting atmospheric composition with climate variability and change

Connecting atmospheric composition with climate variability and change Seminar in Atmospheric Science, EESC G9910. 9/12/12 Overview Loulergue et al., Nature, 2008 Glacial to interglacial variability (methane) Montzka et al., Nature, 2011

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Geologic Time Notes

Geologic Time Notes. May 1, 2013. Relative Dating. Evidence from geologic layers and radioactive dating indicates Earth is approximately 4.6 billion years old and that life on this planet has existed for more than 3 billion years.

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Aim: How do we determine the relative age of rocks?

Aim: How do we determine the relative age of rocks?. 4/5/11. Do Now: What have we already learned about rock age in the last unit (Think about the laws pertaining to strata)? What is contact metamorphism? Take out your review book, a piece of paper, and a PENCIL HW: R&H 278-282 A&E 1-20.

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Age of the Earth

Age of the Earth. How Old is the Earth?. 1654: Archbishop James Ussher of Ireland studied the timing of biblical events described in the Old Testament, and concluded that the world was created on - October 23, 4004 B.C.E. at 9:00 AM.

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Absolute Time

Absolute Time. Mrs. Wright 8 th Grade Science Bath County Middle School. Absolute Ages of Rocks. Absolute age is the age, in years, of a rock or other object. Geologists determine absolute ages by using properties of the atoms that make up materials. Radioactive Decay.

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Evidence of the History of LIFE

Evidence of the History of LIFE. How do scientists know evolution has occurred?. Who looks for the evidence?. Paleontologists: scientists who study fossils Geologists: scientists who study rock layers. Fossil Evidence. Fossils can tell us Structure of an organism What the ate

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