THE ORDOVICIAN EXTINCTION. 444 million years ago
|
|
- Eunice Crawford
- 6 years ago
- Views:
Transcription
1 THE ORDOVICIAN EXTINCTION 444 million years ago
2
3 TOTAL GENERA THROUGH THE PHANEROZOIC ERA The Cambrian to the Present PERMIAN TRIASSIC CRETACEOUS Holocene The Present Miocene DEVONIAN ORDOVICIAN Mississippian Jurassic Silurian Cambrian PANGAEA Super Continent
4 Georgia LAURENTIA Proto-North America The Cambrian World 500 million years ago
5 Georgia LAURENTIA Proto North America The Ordovician World 444 million years ago
6
7
8 ORDOVICIAN LIFE Ordovician strata are characterized by numerous and diverse trilobites and conodonts (phosphatic fossils with a tooth-like appearance) found in sequences of shale, limestone, dolostone, and sandstone. In addition, blastoids, bryozoans, corals, crinoids, as well as many kinds of brachiopods, snails, clams, and cephalopods appeared for the first time in the geologic record in tropical Ordovician environments. Remains of ostraderms (jawless, armored fish) from Ordovician rocks comprise some of the oldest vertebrate fossils. Despite the appearance of coral fossils during this time, reef ecosystems continued to be dominated by algae and sponges, and in some cases by bryozoans. However, there apparently were also periods of complete global reef collapse due to global disturbances. ORDOVICIAN EXTINCTIONS The Extinction at the end of the Ordovician eliminated an estimated 85 percent of all Ordovician species. This extinction interval ranks second in severity to the 95% extinction at the end of the Permian! The end-ordovician extinction is generally attributed to two factors: the first wave of extinction may be related to rapid cooling at the end of the Ordovician Period, and the second phase is widely regarded as having been caused by the sea-level fall associated with the glaciation. The drop in sea level would have drained the large epicontinental seas and reduced the available habitat for organisms that favoured those settings. No concentration of iridium has been identified near the extinction that would suggest a bolide (meteorite or comet) impact like the one identified at the end of the Cretaceous Period.
9
10 The Ordovician mass extinction has been theorized by paleontologists to be the result of a single event; the glaciation of the continent Gondwana at the end of the period. Evidence for this glaciation event is provided by glacial deposits discovered by geologists in the Saharan Desert. By integrating rock magnetism evidence and the glacial deposit data, paleontologists have proposed a cause for this glaciation. When Gondwana passed over the north pole in the Ordovician, global climatic cooling occured to such a degree that there was global large-scale continental resulting in widespread glaciation. This glaciation event also caused a lowering of sea level worldwide as large amounts of water became tied up in ice sheets. A combination of this lowering of sealevel, reducing ecospace on continental shelves, in conjunction with the cooling caused by the glaciation itself are likely driving agents for the Ordovician mass
11 The end Ordovician (Hirnantian) extinction was the first of the five big Phanerozoic extinction events, and the first that involved metazoan-based communities. It comprised two discrete pulses, both linked in different ways to an intense but short-lived glaciation at the South Pole. The first, occurring at, or just below, the Normalograptus extraordinarius graptolite Biozone, mainly affected nektonic and planktonic species together with those living on the shallow shelf and in deeper water whereas the second, within the N. persculptus graptolite Biozone, was less focused, eradicating faunas across a range of water depths. In all about 85% of marine species were removed. Proposed kill mechanisms for the first phase have included glaciallyinduced cooling, falling sea level and chemical recycling in the oceans, but a general consensus is lacking. The second phase is more clearly linked to near-global anoxia associated with a marked transgression during the Late Hirnantian. Most recently, however, new drivers for the extinctions have been proposed, including widespread euxinia together with habitat destruction caused by plate tectonic movements, suggesting that the end Ordovician mass extinctions were a product of the coincidence of a number of contributing factors. Moreover, when the deteriorating climate intensified, causing widespread glaciation, a tipping point was reached resulting in catastrophe.
12 ORDOVICIAN LIMESTONE (I-59 Road Cut NW Georgia)
13 ORDOVICIAN LIMESTONE (I-59 Road Cut NW Georgia)
Ordovician. System. Cambrian. System
443 495 543 Late Middle Early Late Middle Early Ordovician System Cambrian System Earth History, Ch. 13 1 Ch. 13 Review: Early Paleozoic life & Burgess Shale fauna Most animal phyla originated in Cambrian;
More informationModule 9: Earth's History Topic 3 Content: A Tour of Geologic Time Notes
The geologic time scale holds secrets to the life that has existed on Earth since the beginning of time. It is time for you to take a journey through the history of Earth. 1 Click on each of the segments
More informationSpring th Grade
Spring 2015 8 th Grade The geologic time scale is a record of the major events and diversity of life forms present in Earth s history. The geologic time scale began when Earth was formed and goes on until
More informationDirected Reading. Section: Precambrian Time and the Paleozoic Era EVOLUTION. beginning of life is called. to. PRECAMBRIAN TIME.
Skills Worksheet Directed Reading Section: Precambrian Time and the Paleozoic Era 1. Where is the geologic history of Earth recorded? 2. What kind of information can scientists get from the types of rock
More informationPage 143: Geologic Time
Page 143: Geologic Time Divide pages 144-147 in 6 One for each box: Hadeon Eon Archeon Eon Cambrian Period Ordovician Period Silurian Period Devonian Period Carboniferous Period Mississipian Period Pennsylvanian
More information251 Million years. 299 Million years. 318 Million years. 359 Million years
The Late Paleozoic 251 Million years 299 Million years 318 Million years 359 Million years Major Questions How did marine life of late Paleozoic time differ from that of middle Paleozoic time? How did
More informationEarth History. What is the Earth s time scale? Geological time Scale. Pre-Cambrian. FOUR Eras
The Earth is 4.6 billion years old! Earth History Mrs. Burkey ESS Cy Creek HS 17-18 If the Earth formed at midnight 6:00 am First life appears 10:00 pm First animals/plants on land 11:59 pm First humans
More informationBiogeography. Lecture 5
Biogeography. Lecture 5 Alexey Shipunov Minot State University January 25, 2016 Shipunov (MSU) Biogeography. Lecture 5 January 25, 2016 1 / 34 Outline Palaeogeography Plate tectonics Cryogenian period
More informationEras of Earth's History Lesson 6
Eras of Earth's History Lesson 6 May 24 8:42 PM What happened in the Paleozoic Era? What happened in the Mesozoic Era? What happened in the Cenozoic Era? May 24 8:55 PM 1 I. What happened in the Paleozoic
More informationHistory of life on Earth Mass Extinctions.
History of life on Earth Mass Extinctions. Agenda or Summary Layout A summary of the topics discussed 1 2 3 4 Explanation of Mass extinctions The five major mass extinctions Two particular extinctions
More information5 Time Marches On. TAKE A LOOK 1. Identify What kinds of organisms formed the fossils in the picture?
CHAPTER 6 5 Time Marches On SECTION The Rock and Fossil Record BEFORE YOU READ After you read this section, you should be able to answer these questions: How do geologists measure time? How has life changed
More informationPhanerozoic (last 0.54 by) Tectonics Climate Life
Phanerozoic (last 0.54 by) Tectonics Climate Life Tools for Locating Past Continent Positions Fossils depending on climate Alignment of geological features Geometrical fit of continental margins Similarity
More information17-1 The Fossil Record Slide 2 of 40
2 of 40 Fossils and Ancient Life What is the fossil record? 3 of 40 Fossils and Ancient Life Fossils and Ancient Life Paleontologists are scientists who collect and study fossils. All information about
More informationStation Look at the fossil labeled # 16. Identify each of the following: a. Kingdom b. Phylum c. Class d. Genus
Station 1 1. Look at the fossil labeled # 16. Identify each of the following: a. Kingdom b. Phylum c. Class d. Genus 2. Look at the fossil labeled #7. Identify each of the following: a. Kingdom b. Phylum
More informationGeological Time Scale UG Hons.1 st Year) DR. CHANDAN SURABHI DAS ASST. PROF. IN GEOGRAPHY BARASAT GOVT. COLLEGE
Geological Time Scale UG Hons.1 st Year) 1 DR. CHANDAN SURABHI DAS ASST. PROF. IN GEOGRAPHY BARASAT GOVT. COLLEGE 2 Imagine putting everything that has happened on Earth into a one hour time frame! 3 12:00am
More informationChapter 12. Life of the Paleozoic
Chapter 12 Life of the Paleozoic Paleozoic Invertebrates Representatives of most major invertebrate phyla were present during Paleozoic, including sponges, corals, bryozoans, brachiopods, mollusks, arthropods,
More informationUnit 10 Lesson 2 What Was Ancient Earth Like? Copyright Houghton Mifflin Harcourt Publishing Company
How Rocks and Fossils Tell a Story Sedimentary rock forms in layers. Many sedimentary rocks contain fossils. The oldest rock layers are at the bottom, and the youngest rock layers are at the top. The relative
More informationOutline. Origin and History of Life
Origin and History of Life Chapter 19 Primitive Earth Origin of First Cells Fossils The Precambrian The Paleozoic The Mesozoic The Cenozoic Continental Drift Mass Extinctions Outline 1 2 The Primitive
More informationDO NOT WRITE ON THIS EXAM ONLY WRITE ON THE ANSWER SHEET!
DO NOT WRITE ON THIS EXAM ONLY WRITE ON THE ANSWER SHEET! Multiple Choice Questions (30 points) for each question, please choose the best answer and circle your answer on the answer sheet (do not write
More informationHow do we learn about ancient life? Fossil- a trace or imprint of a living thing that is preserved by geological processes.
Unit 1B Lesson 4 History of Life on Earth How do we learn about ancient life? Paleontologists scientists that studies fossils Fossil- a trace or imprint of a living thing that is preserved by geological
More information17-1 The Fossil Record Slide 1 of 40
1 of 40 Fossils and Ancient Life Fossils and Ancient Life Paleontologists are scientists who collect and study fossils. All information about past life is called the fossil record. The fossil record includes
More information2 Eras of the Geologic Time Scale
CHAPTER 8 2 Eras of the Geologic Time Scale SECTION The History of Life on Earth BEFORE YOU READ After you read this section, you should be able to answer these questions: What kinds of organisms evolved
More informationEARTH S HISTORY. What is Geology? logy: science. Geology is the scientific study of the Earth, including its:
EARTH S HISTORY 1 What is Geology? Geo: earth logy: science Geology is the scientific study of the Earth, including its: composition, structure, and physical properties. 2 1 Geologists study: the origin
More informationGeologic Time. Geologic Events
Geologic Time Much of geology is focused on understanding Earth's history. The physical characteristics of rocks and minerals offer clues to the processes and conditions on and within Earth in the past.
More informationTo understand how we measure ancient temperature, you need to know about oxygen isotopes. Pleistocene Climate. Clouds, rain, and oxygen isotopes
To understand how we measure ancient temperature, you need to know about oxygen isotopes Pleistocene Climate Alan R. Rogers February 20, 2014 There are several types of oxygen atoms, called isotopes The
More informationWhat is the Earth s time scale?
Earth History What is the Earth s time scale? The Geological time scale is a record of the life forms and geological events in Earth s history. Scientists developed the time scale by fossils world wide.
More informationQuiz Nine (9:30-9:35 AM)
Quiz Nine (9:30-9:35 AM) UNIVERSITY OF SOUTH ALAAMA GY 112: Earth History Lecture 25: Paleozoic 2: More Laurentia! Instructor: Dr. Douglas W. Haywick Last Time The Paleozoic of North America 1) Laurentian
More informationFossils & The Geologic Time Scale
Fossils & The Geologic Time Scale Fossils Preserved remains or traces of an organism that lived in the past. Fossils are formed when organisms die and are buried in sediment. Eventually the sediment builds
More informationCycles in the Phanerozoic
Cycles in the Phanerozoic Evolutionary trends: extinctions, adaptive radiations, diversity over time Glaciations Sea level change Ocean chemistry Atmospheric CO 2 biosphere Mass extinctions in the..you
More informationThe Proterozoic Eon (2500 ma to 540 ma)
The Proterozoic Eon (2500 ma to 540 ma) December November October September August July June May April March February January 0 Ma Phanerozoic C M P 540 Ma oldest shelly fossils Proterozoic 2500 Ma first
More informationThe Significance of the Fossil Record ( Susan Matthews and Graeme Lindbeck)
The Significance of the Fossil Record ( Susan Matthews and Graeme Lindbeck) The fossil record indicates the evolutionary history of life. Many events together, including: continental drift, changes in
More informationGEOLOGY GL1 Foundation Unit
Candidate Name Centre Number Candidate Number 2 General Certificate of Education Advanced Subsidiary/Advanced 451/01 GEOLOGY GL1 Foundation Unit P.M. THURSDAY, 10 January 2008 (1 hour) Examiner Question
More informationIllustrations of Selected Ordovician fossils
Illustrations of Selected Ordovician fossils Appendix 1 Brachiopods Cephalopods Brachiopods (brack'-i-oh-pods) are a group of marine animals with two shells. They all have an upper and lower shell. The
More informationPhanerozoic Diversity and Mass Extinctions
Phanerozoic Diversity and Mass Extinctions Measuring Diversity John Phillips produced the first estimates of Phanerozoic diversity in 1860, based on the British fossil record Intuitively it seems simple
More informationBiology. Slide 1 of 40. End Show. Copyright Pearson Prentice Hall
Biology 1 of 40 2 of 40 Fossils and Ancient Life What is the fossil record? 3 of 40 Fossils and Ancient Life The fossil record provides evidence about the history of life on Earth. It also shows how different
More informationCauses of Extinction
Causes of Extinction Extinction the process through which a species disappears from Earth, when the birth rate is less than the death rate. When a species becomes extinct, it no longer exists, which can
More informationGeologic Time and Life in the Oceans. Oceans and Life. How Old is Earth? The Solar System? Oceans are the birthplace of life.
Geologic Time and Life in the Oceans Oceans and Life Oceans are the birthplace of life. Life metabolism, growth, reproduction, response to stimuli Metabolism use of energy stored in ambient chemicals Reproduction
More informationThe History of Life on Earth
8 The History of Life on Earth lesson 1 Geologic Time and Mass Extinctions Grade Seven Science Content Standard. 4.b. Students know the history of life on Earth has been disrupted by major catastrophic
More informationQuestion #1: What are some ways that you think the climate may have changed in the area where you live over the past million years?
Reading 5.2 Environmental Change Think about the area where you live. You may see changes in the landscape in that area over a year. Some of those changes are weather related. Others are due to how the
More informationNotes on Life & Geologic Time Name:
Notes on Life & Geologic Time Name: S.W.B.A.T Explain how time can be divided into units Relate changes of Earth s to divisions on the geologic time scale Describe how plate tectonics affects Geologic
More informationThe Phanerozoic Eon. 542 mya Present. Divided into 3 Eras The Paleozoic, Mesozoic, and Cenozoic Eras
542 mya Present The Phanerozoic Eon Divided into 3 Eras The Paleozoic, Mesozoic, and Cenozoic Eras The ends of the Paleozoic and Mesozoic Eras were marked by mass extinctions The Cenozoic Era is still
More informationChapter 10. Early Paleozoic Events
Chapter 10 Early Paleozoic Events The Phanerozoic Eon Consists of three eras (from oldest to youngest): Paleozoic = "ancient life" (542-251 m.y. ago) Mesozoic = "middle life" (251-65.5 m.y. ago) Cenozoic
More informationTIME LINE OF LIFE. Strip for Clock of Eras representing the circumference. 1. Review the eras represented on the Clock of Eras:
TIME LINE OF LIFE Material Time Line of Life Working Time Line of Life Clock of Eras Strip for Clock of Eras representing the circumference Elastic strip for Clock of Eras Presentation 1: Overview 1. Review
More informationAnswers to Section G: Time and the Fossil Record (Relative Dating)
Answers to Section G: Time and the Fossil Record (Relative Dating) Use the following sketch of a geological cross section to answer questions 1 to 3. 1. The most important principle used to determine the
More informationPLATE TECTONICS THEORY
PLATE TECTONICS THEORY Continental drift Sea floor spreading CONTINENTAL DRIFT CONTINENTAL DRIFT 1. The fitness of continents and Continental Reconstruction Earth ~200 million years ago 1.1 Geometrical
More information43 Misconceptions About Spiders: Teaching a Difficult Concept to Preschool and Elementary Children
1 Michigan s Ride on the North 5 38 American Plate 19 25 32 Quantitative and Qualitative Differences in Science Writing With a Writing Template Intervention The New Reality of Higher Education: Technology
More informationUnit 5: Earth s History Practice Problems
Name: Date: 1. Which bedrock would be most likely to contain fossils? A. Precambrian granite B. Cambrian shale C. Pleistocene basalt D. Middle-Proterozoic quartzite 6. Base your answer(s) to the following
More informationThe History of Life. Before You Read. Read to Learn
14 The History of Life section 1 Fossil Evidence of Change Before You Read Throughout Earth s history, many species have become extinct. On the lines below, name some organisms that have become extinct.
More informationMass Extinctions of the Phanerozoic: The Big Five Total number of families end Ord.
Cretaceous Calamity: The Cretaceous-Tertiary Mass Extinction (and other mass extinctions) Mass Extinctions of the Phanerozoic: The Big Five Total number of families Ord. late Dev. Perm. Tri. Cret. Mass
More informationGeologic History A B1
Geologic History A B1 1. A whalebone that originally contained 200 grams of radioactive carbon-14 now contains 25 grams of carbon- 14. How many carbon-14 half-lives have passed since this whale was alive?
More information2) Thickness of Sediment: Estimates range to 150,000 m Average rate of sedimentation: 0.3m / 1,000 yrs. Thus, age of earth 500 million yrs
Geologic Time Notes Uniformitarianism *the laws of nature do not change with time. *Hutton- first to discover geological time, and the first to state that the Earth is much older than 6000 years. *Before
More informationEarth s s Geologic History
The Earth s s Geologic History and The Earth s s Interior Earth s s Geologic History Geologic timescale Divides Earth s s history into relative time periods Relative dating based on: (apply for entire
More information2) Flattening Stage: dust cloud flattens into a disc, with an early (proto) sun forming at a denser center
Geologic Time Notes Earth Realms Form and Evolve 17 BYA: Universe Begins, give or take a billion or so 5-7 BYA: Solar System Forms Dust Cloud Hypothesis: 1) Collapsing Stage: space matter, dust and light
More informationTIME. Does not give the. Places events in sequencee 1 st, 2 nd, 3 rd. Gives a. exact date of an event. event. Radioactive Dating.
Geologic History TIME Places events in sequencee 1 st, 2 nd, 3 rd Does not give the exact date of an event Gives a date or time of an event Uses the Law of Superposition Radioactive Dating Youngest Law
More informationThe Eras of the Earth In this lesson, we will study the changes that have taken place on the earth since it was formed 4.5 billion years ago. There have been big changes in the temperature of the land,
More information3. The diagram below shows how scientists think some of Earth's continents were joined together in the geologic past.
1. The map below shows the present-day locations of South America and Africa. Remains of Mesosaurus, an extinct freshwater reptile, have been found in similarly aged bedrock formed from lake sediments
More informationSTAG1032: PHYSICAL GEOLOGY (Geologi Fizik) Continental Drift Concept
STAG1032: PHYSICAL GEOLOGY (Geologi Fizik) Continental Drift Concept (Konsep Hanyutan Benua) Hypothesis die Verschieburg der Kontinente Dr. Wan Zuhairi Wan Yaacob Program Geologi, UKM Konsep Hanyutan Benua
More informationMASS EXTINCTION. Halesworth & District
MASS EXTINCTION Halesworth & District 1 Signs indicate an imminent 6 th Mass Extinction and this time Humans are the cause 2 MASS EXTINCTION A Mass Extinction Event is a widespread and rapid decrease in
More informationMonday 3 June 2013 Morning
Monday 3 June 2013 Morning A2 GCE GEOLOGY F795/01 Evolution of Life, Earth and Climate *F713200613* Candidates answer on the Question Paper. OCR supplied materials: None Other materials required: Electronic
More informationL.O: HOW GEOLOGISTS SEQUENCE EVENTS IN EARTH'S GEOLOGIC HISTORY IF NOT OVERTURNED, OLDEST ON BOTTOM, YOUNGEST ON TOP
L.O: HOW GEOLOGISTS SEQUENCE EVENTS IN EARTH'S GEOLOGIC HISTORY IF NOT OVERTURNED, OLDEST ON BOTTOM, YOUNGEST ON TOP 1. Unless a series of sedimentary rock layers has been overturned, the bottom rock layer
More informationLECTURE #25: Mega Disasters - Mass Extinctions, Meteorite Impacts...
GEOL 0820 Ramsey Natural Disasters Spring, 2018 LECTURE #25: Mega Disasters - Mass Extinctions, Meteorite Impacts... Date: 19 April 2018 I. Time & Life on Earth geologic time scale o divided into named
More informationSAMPLE QUESTIONS FOR GEOLOGY 103, TEST 1
SAMPLE QUESTIONS FOR GEOLOGY 103, TEST 1 The correct answers are listed at the bottom (no peeking!). These questions are to give you an idea of the type of questions that will be asked. They are not a
More informationGEOLOGY - GL4 INTERPRETING THE GEOLOGICAL RECORD
Candidate Name Centre Number 2 Candidate Number GCE A level 1214/01 GEOLOGY - GL4 INTERPRETING THE GEOLOGICAL RECORD A.M. MONDAY, 21 June 2010 2 hours Section A 1. 2. 3. 15 15 15 1214 01 01 4. 15 Section
More informationFossils Biology 2 Thursday, January 31, 2013
Fossils Biology 2 Evolution Change in the genetic composition of a group of organisms over time. Causes: Natural Selection Artificial Selection Genetic Engineering Genetic Drift Hybridization Mutation
More information3. [ES 3] 1. [ST8.2] Some processes that shape Earth s surface are slow. Other processes are rapid. Which statement describes a rapid change?
Science 8 SCIENCE QUARTERLY ASSESSMENT 2 3. [ES 3] S 1. [ST8.2] Some processes that shape Earth s surface are slow. Other processes are rapid. Which statement describes a rapid change? A. Glaciers melt
More informationSkeletal grains. Pores. Matrix <20 m) Cement. Non-skeletal grains. 1 cm
Components of a Carbonate rock Skeletal grains Pores Matrix
More informationName: Date: Period: Page 1
Name: Date: Period: Base your answers to questions 1 through 4 on the three bedrock outcrops below and on your knowledge of Earth science. The outcrops, labeled I, II, and III, are located within 15 kilometers
More informationEarth Science Ch. 14 Geologic Time. What is geologic time?
Earth Science Ch. 14 Geologic Time What is geologic time? The division of Earth s history into time units back to 4.6 b.y.a. Usually based on the life-forms that lived during certain periods May be based
More informationThe Origin of Life. Lab Exercise 18. Contents. Introduction. Objectives
Lab Exercise The Origin of Life Contents Objectives 1 Introduction 1 Activity.1 Geologic Time 2 Activity.2 Time Periods 2 Resutls Section 6 Introduction The history of the earth is recorded in the rocks
More informationEarth s History. The principle of states that geologic processes that happened in the past can be explained by current geologic processes.
Earth s History Date: Been There, Done That What is the principle of uniformitarianism? The principle of states that geologic processes that happened in the past can be explained by current geologic processes.
More informationMass Extinctions &Their Consequences
Mass Extinctions &Their Consequences Taxonomic diversity of skeletonized marine animal families during the Phanerozoic Spindle diagram of family diversification/extinction PNAS 1994. 91:6758-6763. Background
More informationWHO'S ON FIRST? A RELATIVE DATING ACTIVITY
WHO'S ON FIRST? A RELATIVE DATING ACTIVITY MARSHA BARBER and DIANA SCHEIDLE BARTOS INTRODUCTION PALEONTOLOGY, AND in particular the study of dinosaurs, is an exciting topic to people of all ages. Although
More informationThe principle of fossil succession allows strata in different parts of the world to be correlated, and worldwide relative ages to be worked out
Correlating beds using index fossils Stratigraphic Classification: Piles of stratified rocks need to be classified. A formation is an easily identifiable rock unit that differs from layers above and below
More informationLecture 24: Paleozoic 1:
UNIVERSITY OF SOUTH ALABAMA GY 112: Earth History Lecture 24: Paleozoic 1: Laurentia Instructor: Dr. Douglas W. Haywick Last Time (before the exam) The Cambrian Explosion A) Why a Cambrian explosion B)
More informationGeologic History. A. Basic Geologic Principles The relative age of rock formations relies on the following basic geologic principles:
Geologic History I. Relative Age Dating of Rocks Relative age of rocks does not rely on an exact date of a rock, but relates its age relative to other rock formations or layers. A. Basic Geologic Principles
More information1 The origin of life (pp )
ST chapter only Checkup Chapter 10 1 The origin of life (pp. 300 305) 1. Earth took millions of years to form. a) Where did the matter that formed our planet come from? From a cloud of gas and dust that
More informationReview participation point: The evidence for a fluid outer core is:
DDA1 Continental Drift to Plate Tectonics PS 100 Chapter 28 Review participation point: The evidence for a fluid outer core is: A. Average density of the earth is greater than the density of the crust.
More informationEarth Science. Name Block. Unit 3 Review Worksheet. Circle the letter that corresponds to the correct answer
Earth Science Unit 3 Review Worksheet Name Block Circle the letter that corresponds to the correct answer 1. Which geologic principle is used when a geologist observes an outcrop or rocks and determines
More informationGO ON. Directions: Use the diagram below to answer question 1.
d i a g n o s t i c t e s t : e a r t h a n d s p a c e s c i e n c e question 1. 1. What is the correct order (starting from the surface) of Earth s layers? A crust, outer core, inner core, mantle B mantle,
More informationMesozoic Era 251 m.y.a 65.5 m.y.a
Mesozoic Cenozoic notes.notebook Mesozoic & Cenozoic 251 m.y.a Present at the end of the Permian, 90% of marine organisms and more than 70% of land organisms died. because resources and space were readily
More informationExemplar for Internal Achievement Standard. Earth and Space Science Level 2
Exemplar for internal assessment resource Earth and Space Science for Achievement Standard 91188 Exemplar for Internal Achievement Standard Earth and Space Science Level 2 This exemplar supports assessment
More informationChapter Introduction. Chapter Wrap-Up. Explosion
Chapter Introduction Lesson 1 Lesson 2 Lesson 3 Chapter Wrap-Up Geologic Time Ancient Earth The Cambrian Explosion How have natural events changed Earth over time? What do you think? Before you begin,
More informationHow the Earth was formed
How the Earth was formed Short Answer: (2 points a piece) 1) Who was the man that stated the Earth was 6000 yrs old? 2) Hutton determined that this age was incorrect, what lead him to a much later date?
More informationClues to the Past. Grades 6-8 Educational Program Guide
Clues to the Past Grades 6-8 Educational Program Guide OAS Science Practices: 1, 2, 3, 4, 6, 7, 8 Program Overview The Clues to the Past program will introduce students to several 300 million years old
More information(continued) Stephen Eikenberry 11 September 2012 AST 2037
Development of Life (continued) Stephen Eikenberry 11 September 2012 AST 2037 1 Evolutionary Timeline 530 MYa first footprint fossil found on land 505 Mya first true fish in the sea 475 MYa first land
More informationUNDERSTANDING GEOLOGIC TIME
Name: Date: Period: UNDERSTANDING GEOLOGIC TIME The earth is 4.6 billion years old. That s a long time! The scale of geologic time is so different from what human beings experience that it s often quite
More informationPlate Tectonics. Alfred Lothar Wegener. Relatively new theory - introduced about 30 years ago Unifies several branches of the Earth Sciences
Plate Tectonics Relatively new theory - introduced about 30 years ago Unifies several branches of the Earth Sciences http://pubs.usgs.gov/publications/text/dynamic.html Alfred Lothar Wegener In 1858, geographer
More informationPlease take out your fill-in notes again, and we will continue learning about extinct creatures.
Today s Topic Evolution: Extinction Learning Goal: SWBAT explain why creatures go extinct from Earth, and why some recently-extinct creatures have gone extinct. Please take out your fill-in notes again,
More informationLinks to help understand the immensity of the Geologic Time Scale
Links to help understand the immensity of the Geologic Time Scale http://www.bonnechere.ca/naturalhistory.htm http://comp.uark.edu/~sboss/geotime.htm http://www.britannica.com/ebchecked/media/1650/the-geologic-time-scale-from-650-million-years-ago-to
More informationMass Extinctions &Their Consequences
Mass Extinctions &Their Consequences Microevolution and macroevolution Microevolution: evolution occurring within populations p Adaptive and neutral changes in allele frequencies Macroevolution: evolution
More informationGeologic Time. What have scientists learned about Earth s past by studying rocks and fossils?
Name Geologic Time What have scientists learned about Earth s past by studying rocks and fossils? Before You Read Before you read the chapter, think about what you know about geologic time Record your
More informationFossils. Name Date Class. A Trip Through Geologic Time Section Summary
Name Date Class A Trip Through Geologic Time Section Summary Fossils Guide for Reading How do fossils form? What are the different kinds of fossils? What does the fossil record tell about organisms and
More informationDiversity, Change and Continuity. History of Life
Diversity, Change and Continuity History of Life Change throughout the history of Life. A summary of content covered 1 2 3 4 Changes in the atmosphere Changes in climate Geological events Biogeography
More informationExtinctions & Climate Change Student Activity. Diagram interpretation and using research data
Diagram interpretation and using research data Biodiversity relates to the variety of life found in an area. The number and variety of species is a simple measure of its health i.e. its ability to respond
More informationWho s On First? A Relative Dating Activity
NAME: DATE: PERIOD: Who s On First? A Relative Dating Activity Scientists have good evidence that the earth is very old, approximately four and one-half billion years old. Scientific measurements such
More informationFossils, Geologic Time, Absolute & Relative Dating, and Natural Resources. Chapters 5 & 6
Fossils, Geologic Time, Absolute & Relative Dating, and Natural Resources Chapters 5 & 6 How Do Fossils Form? Fossils are found in sedimentary rocks like sandstone, limestone, and shale In Virginia, most
More informationContinental drift
Plate Tectonics Continental drift Continental drift Continental drift Continental drift Continental drift Plate Tectonics Plate Tectonics Continental Drift and Paleomagnetism Paleomagnetism Renewed interest
More informationName: Hour: Date: Materials: two sets of sequence cards in random order (set A: nonsense syllables; set B: sketches of fossils), pencil, paper
INTRODUCTION Scientists have good evidence that the earth is very old, approximately four and one-half billion years old. Scientific measurements such as radiometric dating use the natural radioactivity
More informationGEOLOGY 12 CHAPTER 8 WS #3 GEOLOGIC TIME & THE FOSSIL RECORD
GEOLOGY 12 CHAPTER 8 WS #3 GEOLOGIC TIME & THE FOSSIL RECORD NAME Multiple Choice 1. Fossils are most commonly found in A. sedimentary rocks. B. metamorphic rocks. C. igneous rocks. D. all kinds of rocks.
More informationThe Lithosphere and the Tectonic System. The Structure of the Earth. Temperature 3000º ºC. Mantle
The Lithosphere and the Tectonic System Objectives: Understand the structure of the planet Earth Review the geologic timescale as a point of reference for the history of the Earth Examine the major relief
More information