Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu The History of Life on Earth Table of Contents Section 1 Evidence.

Slides:



Advertisements
Similar presentations
Add this unit to your Table of contents!
Advertisements

How to Use This Presentation
The Geologic Time Scale. Geologic Time Scale : Scientists have formed a chronology of Earth’s history based on evidence from the Earth’s rocks and fossils.
WARMUP # 3 S7L5c. Explain how a fossil record found in sedimentary rock provides evidence for the long history of a changing life forms. What do you think.
Copyright Pearson Prentice Hall
Scientists have divided geologic history into 4 main parts: Precambrian Time Paleozoic Era Mesozoic Era Cenozoic Era.
Geologic Time Scale.
Origins of Life Early Idea: Spontaneous Generation
Table of Contents Chapter Preview 8.1 The Rock Cycle
Chapter 21 – Earth’s History
Chapter 5: Fossils and Geologic Time
Earth’s History & Geologic Time Notes
Earth History: Geologic Time
Geologic Time Scale Chapter 9, Section 3 Measuring Time The Earth has existed for 4.6 billion years The geologic time scale divides all those.
History of Earth. Slide 38 - Geologic Time Scale Sequence of events from Earth’s birth to present-day (now). Each Era begins after a mass extinction of.
< BackNext >PreviewMain Section 1 Evidence of the Past Objectives Explain how fossils can be formed and how their age can be estimated. Describe the geologic.
Unit 9 Geological Time. Unit 9 Title Page Geological Time – Unit 9 Earth Space Science 6 th grade.
Scientists have developed a model of the history of life on Earth called the geologic time scale. The geological time scale is based on studies of Earth’s.
14.1 Fossil Evidence of Change Land Environments The History of Life Chapter 14  Earth formed about 4.6 billion years ago.  Gravity pulled the densest.
End Show Slide 1 of 40 Copyright Pearson Prentice Hall 17-1 The Fossil Record.
Earth History - The Geologic Time Scale
Thursday, May 22 Pick up a white board and marker. Goal: Explain why studying paleontology is important.
History of Life on Earth Chapter 6. Evidence of the Past How do fossils form? The heat and pressure from being buried in sediment can sometimes cause.
Section 1: Geologic Time
CO- The Geologic time scale and geologic history
Geologic Time Scale Chapter 9, Section 3.
Geologic Time Scale. How’s it divided?  Instead of being divided into months or years, the geologic time scale is divided into eras.  Eras are divided.
History of Biological Diversity 14.1 The History of Life.
CHAPTER 6C EVIDENCE OF THE PAST. Paul Sereno……1995 Found dinosaur skull 1.5 m long Paleontologist – use fossils to reconstruct the past.
The History of Life on Earth
I. Early Life on Earth Earth formed about 4.6 billion years ago Earth was very hot Atmosphere - little Oxygen. Mostly water vapor, CO, CO 2, and N 2.
Geologic Time Scientists have developed a model of the history of life on Earth called the geologic time scale. Paleontologists divide the geologic time.
Fossil Evidence of Change Part 2 Chapter 14 Section 1.
Chapter 8 The History of Life on Earth Conner Blackman High School.
Ch 14.1 The record of life You will … 1. examine how rocks and fossils provide evidence of changes in Earth’s organisms 2. correlate the geographic time.
Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu How to Use This Presentation To View the presentation as a slideshow.
Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Table of Contents Section 1 Change over Time Section 2 How Does Evolution.
Chapter 8 The History of Life on Earth. Radioactive Half-Life The radioactive half-life for a given radioisotope is the time for half the radioactive.
I. What was it like on early Earth ? Very hot Meteorites colliding into earth Frequent volcanic activity Atmosphere with little oxygen & lots of nitrogen.
The History of Life on Earth Life Science. Evidence of the Past Fossils provide clues about to Earth’s past. They are traces or imprints of living things.
Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu CH. 9 - EARTH’S HISTORY Students know the evidence from geological.
17-1 The fossil Record 17-2 Earth’s Early History 17-3 Evolution of Multicellular life 17-4 Patterns of Evolution.
Chapter billion years ago, the Earth was born. Consider that the Earth formed, life arose: - the first tectonic plates arose and began to move.
Origins of Life. Earth was very different Billions of Years Ago The Earth is thought to be 4.6 Billion Years Old Early Earth was lifeless –Intensely hot.
Unit 1 Lesson 4 The History of Life on Earth Copyright © Houghton Mifflin Harcourt Publishing Company.
Chapter 10, Section 5 Earth’s Geologic Timescale I will describe how scientists use fossil and rock evidence to create Earth’s Geological timescale.
Unit 1 Lesson 4 The History of Life on Earth
CHAPTER 17 THE HISTORY OF LIFE
Chapter 14 The History of Life.
Unit 1 Lesson 4 The History of Life on Earth
Big Idea: The types and characteristics of organisms change over time.
Chapter 9 Study Notes A View of Earth’s Past.
Section 1: Geologic Time
The Geologic Time Scale
Earth History: Geologic Time
Honorable Mr. Lehman Lehman Lab © 2018
Earth formed about 4.6 billion years ago.
Do First 1. Grab a notes paper, a scantron, and a pre-test.
Precambrian Time This began about 4.6 billion years ago.
Earth History: Geologic Time
The Geologic Time Scale
Earth’s Structure Earth’s History
The History of Life on Earth
Earth History: Geologic Time
Do First 1. Grab a notes paper, a scantron, and a pre-test.
Notes #6: Geologic Timescale
Earth History: Geologic Time
Unit 1 Lesson 4 The History of Life on Earth
C-Notes: Early Earth Stnd: 8e 3/24/2014 Objective:
Earth History: Geologic Time
Presentation transcript:

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu The History of Life on Earth Table of Contents Section 1 Evidence of the Past Section 2 Eras of the Geologic Time Scale Section 3 Humans and Other Primates Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 1 Evidence of the Past Objectives Explain how fossils can be formed and how their age can be estimated. Describe the geologic time scale and the way that scientists use it. Compare two ways that conditions for life on Earth have changed over time. Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 1 Evidence of the Past Fossils Life Preserved in Rock Fossils are traces or imprints of living things—such as animals, plants, bacteria, and fungi— that are preserved by geological processes. Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 1 Evidence of the Past The Age of Fossils Life Preserved in Rock Estimating the age of rocks and fossils based on its position in sedimentary rock is called relative dating. Absolute dating is a method that measures the age of fossils or rocks in years. The next slide shows how half-lives can be used to date fossils. Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 1 Evidence of the Past Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 1 Evidence of the Past The Geologic Time Scale * is called the geologic time scale. Divisions in Time Paleontologists have divided the geologic time scale into large blocks of time. Mass Extinctions Some of the important divisions in the geologic time scale mark times when rapid changes happened on Earth. * extinct. Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 1 Evidence of the Past Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 1 Evidence of the Past The Changing Earth Pangaea German scientist Alfred Wegener proposed that long ago the continents formed one landmass, which he called Pangaea, surrounded by a gigantic ocean. Do the Continents Move? In the mid-1960s, J. Tuzo Wilson of Canada came up with the idea that huge pieces of the Earth’s crust were pushed around by forces within the planet. * plate tectonics. Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 1 Evidence of the Past Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 1 Evidence of the Past The Changing Earth Adaptations to Slow Change When conditions on the Earth change, organisms may adapt or become extinct. A rapid change, such as a meteorite impact, may cause a mass extinction. But slow changes, such as moving continents, allow time for adaptation. Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Eras of the Geologic Time Scale Objectives Outline the major developments that allowed life to exist on Earth. Describe the types of organisms that arose during the four major divisions of the geologic time scale. Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Eras of the Geologic Time Scale Precambrian Time Precambrian time is * How Did Life Begin? Scientists think that life developed from simple chemicals in the oceans and in the atmosphere. Energy from radiation and storms could have caused these chemical to react. Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Eras of the Geologic Time Scale Precambrian Time, continued Photosynthesis and Oxygen The first cyanobacteria began to release oxygen gas into the oceans and air. Eventually, some of the oxygen formed a new layer of gas in the upper atmosphere. Multicellular Organisms After about 1 billion years, organisms that were larger and more complex than prokaryotes appeared in the fossil record. Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Origin of Eukaryotic Cells Chapter 8 Click below to watch the Visual Concept. You may stop the video at any time by pressing the Esc key. Visual Concept Section 2 Eras of the Geologic Time Scale

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Eras of the Geologic Time Scale The Paleozoic Era The Paleozoic era began about * Life on Land During the 300 million years of the Paleozoic era, plants, fungi, and air-breathing animals slowly colonized land. Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Eras of the Geologic Time Scale The Mesozoic Era The Mesozoic era began about *. Life in the Mesozoic Era Dinosaurs are the most well known reptiles that evolved during the Mesozoic era. The Extinction of Dinosaurs At the end of the Mesozoic era, 65.5 million years ago, dinosaurs and many other animal and plant species became extinct. Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Eras of the Geologic Time Scale The Cenozoic Era The Cenozoic era began about* The Age of Mammals The Cenozoic era is sometimes called the Age of Mammals. Mammals have dominated the Cenozoic era the way reptiles dominated the Mesozoic era. The Cenozoic Era Today We are currently living in the Cenozoic era. Modern humans appeared during this era. Chapter 8

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Eras of the Geologic Time Scale Chapter 8