Studying The Past. II. Why Do We Study Fossils Found in Rocks?
|
|
|
- Osborn Merritt
- 6 years ago
- Views:
Transcription
1 Studying The Past I. What is a Fossil? A. Definition: The evidence or remains of once-living plants or animals II. Why Do We Study Fossils Found in Rocks? A. To provide evidence of the past existence of life forms B. To provide information about past environmental conditions C. To provide evidence that populations have undergone change over time due to environmental changes (evolution)
2 III. Types of Fossils A. Original Preservation 1. Description: plant or animal remains that have not undergone change since death. a. Uncommon because frozen, extremely dry, or oxygenfree environments are required to form these fossils b. Examples: Mummified humans Frozen organisms (Ice Man) Mammoths & cats in La Brea Tar Pits Fossilized insects in tree sap (amber)
3 B. Altered Hard Parts 1. Description: all organic material has been removed and the hard parts of the organism have been changed a. Minerals seep in slowly and replace the original organic tissue, forming a rock-like fossil b. The fossil has the same shape as the original object, but is chemically more like a rock! c. Examples: Petrified wood Recrystallized shells
4 C. Molds and Casts 1. Description: Fossils that do not contain any shell or bone a. A mold is formed when original shell parts are weathered and eroded, leaving an impression of the shell. b. This cavity might later become filled with minerals or sediment to create a cast. c. Examples: Common with shellfish
5 D. Trace Fossils 1. Description: Indirect evidence of plant and animal life a. Provide information about how an organism lived, moved or obtained food b. Examples: worm trails burrows footprints
6 IV. Dating Fossils A. Relative-Age Dating: 1. Definition: Dating rocks and fossils by placing them in chronological order without exact dates. 2. Geologic Principles (used in this dating process): a. Original Horizontality Sedimentary rocks are deposited in horizontal layers b. The Law of Superposition in an undisturbed sequence the oldest rocks are at the bottom and each successive layer is younger c. Principle of Cross-Cutting Relationships: an intrusion or a fault is younger than the rock it cuts across
7 3. Other Means of Determining Relative Age a. Correlation Used to date rock layers that are far apart from each other Geologists examine rocks for distinctive fossils (index) and features to help identify and date them Relative Dating - Applying the Concepts 1. Which is the oldest rock unit in the outcrop? 2. Explain why the rock layers on the west side of the outcrop do not match the east side. 3. Which is the younger layer, layer A or layer C?
8 B. Absolute-Age Dating: 1. Definition: Dating rocks and fossils by using techniques to determine their actual age. 2. Methods: a. Tree Rings and Seasonal Climatic Changes Each tree ring represents 1 year of growth Varves are bands of sediment that show a yearly cycle from climate change Although accurate, neither method can be used to date very far back in time.
9 Methods cont.: b. Radioactive Dating: Dating fossils based on the amount of radioactive material remaining in a substance over time Radioactive substances (unstable atoms) emit protons and neutrons at a constant rate The original element (parent) is converted to a different element (daughter) Since the rate of decay is constant, you can measure the parent to daughter ratio to determine the age of the rock The length of time it takes for one-half of the original amount to decay is called the elements halflife.
10 Absolute Dating - Applying the Concepts Ex. Uranium-238 will decay into an isotope of lead, Pb - 206
11 Example: Uranium-238 Lead half-life 2 half-lives 0 years 100 % U 4.5 billion years 50 % U 50 % lead Graph 9 billion years 25 % U 75 % lead %U left time
12 C. A Special Case of Relative/Absolute Dating - Index Fossils 1. Description: Remains of unique species that can be used to correlate rock layers or to date a particular rock layer a. Must be easily recognized, abundant, and widely distributed geographically b. Must have lived during a relatively short time period c. If we can date a rock layer absolutely (exact age), then we can use the index fossil to date similar rock layers absolutely d. If we can only date the rock layer relatively (approximate age), then we can use the index fossil date similar rock layers relatively. e. Examples: The mollusk Ecphora has a distinctive shape
Studying The Past. Why Do We Study Fossils Found in Rocks?
I. What is a Fossil? Studying The Past A. Definition: The evidence or remains of once-living plants or animals Why Do We Study Fossils Found in Rocks? QQ#1 what is a fossil? Why are they important? A.
Studying The Past. II. Why Do We Study Fossils Found in Rocks?
Studying The Past I. What is a Fossil? A. Definition: The evidence or remains of once-living plants or animals II. Why Do We Study Fossils Found in Rocks? A. To provide evidence of the past existence of
FOSSILS. Book G Chapter 4 Section 1
FOSSILS Book G Chapter 4 Section 1 OVERVIEW Explain what fossils are and how most fossils form. Describe what fossils tell about how organisms have changed over time. Identify and describe different types
What we will learn about Fossils?
The fossil Record What we will learn about Fossils? We will learn how fossils form? What types of fossils exist? How do scientists determine the age of fossils? What do fossils reveal to scientists? What
Clues to Earth s Past. Fossils and Geologic Time
Clues to Earth s Past Fossils and Geologic Time Fossils A. Paleontologists study fossils and reconstruct the appearance of animals. Fossils B. Fossils remains, imprints, or traces of prehistoric organisms
Objectives. Vocabulary. Describe the geologic time scale. Distinguish among the following geologic time scale divisions: eon, era, period, and epoch.
The Geologic Time Scale Objectives Describe the geologic time scale. Distinguish among the following geologic time scale divisions: eon, era, period, and epoch. Vocabulary geologic time scale eon era period
NOTES: The Fossil Record and Geologic Time
NOTES: The Fossil Record and Geologic Time Vocabulary: Paleontologist Fossil record extinct Relative dating Absolute dating Geologic time scale Objectives: What are fossils? How are they made? How do scientists
Fossils. Presented by Kesler Science
Presented by Kesler Science Essential Questions: 1. What are fossils? 2. What are some different types of fossilization? 3. What is the difference between relative and absolute age? 4. What does the fossil
A Trip Through Geologic Time
A Trip Through Geologic Time A Trip Through Geologic Time Review In: Have the same animals that live today always been on Earth? Illustrate and JUSTIFY. When finished with this In Question, show Ms. Johnson
3 Absolute Dating: A Measure of Time
CHAPTER 3 3 Absolute Dating: A Measure of Time SECTION The Rock and Fossil Record BEFORE YOU READ After you read this section, you should be able to answer these questions: How can geologists learn the
Integrated Science. Geologic Time Notes. Section 1: Geologic Time
Integrated Science Geologic Time Notes Section 1: Geologic Time To help in the analysis of Earth s rocks, geologists have divided the history of Earth into time units based upon the fossils contained in
Clues to Earth s Past
Chapter Review Clues to Earth s Past Part A. Vocabulary Review Directions: Use the clues below to complete the crossword puzzle. 1 2 3 4 5 6 7 8 9 Across 2. Element found in tissues of most organisms 4.
8. GEOLOGIC TIME LAST NAME (ALL IN CAPS): FIRST NAME: Instructions
LAST NAME (ALL IN CAPS): FIRST NAME: Instructions 8. GEOLOGIC TIME Refer to Exercise 6 in your Lab Manual on pages 151-168 to answer the questions in this work sheet. Your work will be graded on the basis
Earth s Changing Surface Chapter 4
Name Hour Due Date Earth s Changing Surface Chapter (You do not need your book) Page 1 Fossils Summary Page 2 Traces of Tracks Page 3 Finding the Relative Age of Rocks Summary. Page - Finding the Relative
Module 9: Earth s History Topic 4 Content: Formation of Fossils Notes
Introduction There are a variety of ways in which fossils can form. In this interactivity, click on each of the thumbnail images in the panel to explore the types of fossils and their formation. 1 Tar
Section 1 Darwin s theory
Evolution Section 1 Darwin s theory EVOLUTION The gradual change in a species over time. 2 types EVOLUTION Microevolution: change within a species. Macroevolution: change of a species into a new species.
Geologic Time. Decoding the Age of our Planet & North Carolina
Geologic Time Decoding the Age of our Planet & North Carolina The Geologic Time Scale Objectives Describe the geologic time scale. Distinguish among the following geologic time scale divisions: eon, era,
Name Class Date. What are fossils? How are fossils formed? What can fossils tell us about the history of life on earth?
CHAPTER 5 2 Looking at Fossils SECTION The Fossil Record BEFORE YOU READ After you read this section, you should be able to answer these questions: What are fossils? How are fossils formed? What can fossils
Topic 7: Historical Geology
Topic 7: Historical Geology (ES. 8 b, 9 a-e, 10 a-d, 12 a, b, e) ES.8 The student will investigate and understand geologic processes including plate tectonics. Key concepts include: b) processes (faulting,
1 Looking at Fossils. What are fossils? How are fossils formed? What can fossils tell us about the history of life on earth?
CHAPTER 9 SECTION The History of Life on Earth 1 Looking at Fossils California Science Standards 7.3.c, 7.4.c, 7.4.e BEFORE YOU READ After you read this section, you should be able to answer these questions:
Your quiz will have some multiple-choice questions, matching, fill-in-the-blank questions, and short answer. To review, study DQs, notes from class,
Review for Strata & Fossil Quiz Name: Quiz Date: Your quiz will have some multiple-choice questions, matching, fill-in-the-blank questions, and short answer. To review, study DQs, notes from class, labs,
TRACE FOSSIL FOSSIL ICE CORE RELATIVE DATING SUPERPOSITION ABSOLUTE DATING GEOLOGIC COLUMN UNIFORMITARIANISM HALF-LIFE RADIOACTIVE DECAY
THIS IS NOT THE SAME TEST. YOU MUST ANSWER ALL QUESTIONS. NAME: Bubble the circle below U3L1 Write the letter next to the vocab term VOCAB MATCH 1 A. O B. O C. O D. O 1 2 A. O B. O C. O D. O 2 3 A. O B.
CHAPTER 8 DETERMINING EARTH S AGE RELATIVE AND ABSOLUTE ROCK AGES. Loulousis
CHAPTER 8 DETERMINING EARTH S AGE RELATIVE AND ABSOLUTE ROCK AGES Loulousis Bellringer What are 5 visual clues that help you determine if someone is older or younger than you? Color of hair Wrinkles in
GEOLOGIC EVENTS SEDIMENTARY ROCKS FAULTING FOLDING TILTING
RELATIVE TIME (DATING) ABSOLUTE TIME (DATING) GEOLOGIC TIME List the order in which events occurred, without regard to the amount of time separating them. Refers to the age of a rock in relation to other
Directed Reading. Section: Determining Relative Age. conclusions? UNIFORMITARIANISM. geology? of Earth? Skills Worksheet
Skills Worksheet Directed Reading Section: Determining Relative Age 1. How old is Earth estimated to be? 2. Who originated the idea that Earth is billions of years old? 3. On what did the 18th-century
There are actually 5 processes
There are actually 5 processes )WEATHERING hen rocks are roken down nto sediment y Physical and hemical orces 2) ERODE - when sediment is CARRIED to a new location 3) DEPOSIT - when sediment is DROPPED
Geologic History Unit Notes. Relative age - general age statement like older, younger more recent
Geologic History Unit Notes Relative age - general age statement like older, younger more recent Absolute age - specific age like 4,600 million years old Fundamental Principles of Relative Dating 1. Uniformitarianism
Looking at Fossils. Fossilized Organisms. Fossils in Rocks. Fossils in Amber
1 Looking at Fossils Key Concept Fossils provide evidence of how life and environmental conditions have changed. What You Will Learn Evidence of past life is preserved as fossils in sedimentary rock and
Objectives: Define Relative Age, Absolute Age
S6E5. Students will investigate the scientific view of how the earth s surface is formed. c. Classify rocks by their process of formation. g. Describe how fossils show evidence of the changing surface
Geologic Time. What is Age? Absolute Age The number of years since the rock formed. (150 million years old, 10 thousand years old.
Geologic Time There are 2 kinds: What is Age? Absolute Age The number of years since the rock formed. (150 million years old, 10 thousand years old.) Relative Age The age compared to the ages of other
Geologic Time Test Study Guide
Geologic Time Test Study Guide Chapter 12 Section 1 The Earth s Story and Those Who First Listened 1. What is the difference between uniformitarianism and catastrophism? Uniformitarianism: the same geologic
Unit 2 Lesson 3 Absolute Dating. Copyright Houghton Mifflin Harcourt Publishing Company
It s About Time! How can the absolute age of rock be determined? Determining the actual age of an event or object in years is called absolute dating. Scientists often use radioactive isotopes to find the
Earth 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.
Geologic Time. Earth s History
Geologic Time Chapter 12 Earth s History Earth s history is recorded in rocks Rocks record geological events and changing life forms of the past. We have learned that Earth is much older than anyone had
Chapter: Clues to Earth s Past
Table of Contents Chapter: Clues to Earth s Past Section : Section 2: Relative Ages of Rocks Section 3: Absolute Ages of Rocks Traces of the Distant Past Paleontologists, scientists who study fossils,
Prentice Hall EARTH SCIENCE
Prentice Hall EARTH SCIENCE Tarbuck Lutgens Chapter 12 Geologic Time 12.1 Discovering Earth s History Rocks Record Earth History Rocks record geological events and changing life forms of the past. We have
HISTORICAL GEOLOGY. Relative & Absolute age, fossils and geologic time
HISTORICAL GEOLOGY Relative & Absolute age, fossils and geologic time Historical Geology A. Measuring Time 1. Relative Time (Relative Age) Measurement of time using comparison. No numbers used; uses words
Name Class Date. 1. In your own words, write a definition for each of the following terms: superposition, geologic column, and geologic time scale.
Skills Worksheet Chapter Review USING KEY TERMS 1. In your own words, write a definition for each of the following terms: superposition, geologic column, and geologic time scale. For each pair of terms,
Lecture 10 Constructing the geological timescale
Lecture 10 Constructing the geological timescale Geologic Time Discovering the magnitude of the Earth s past was a momentous development in the history of humanity This discovery forever altered our perception
Notepack 19. AIM: How can we tell the age of rocks? Do Now: Regents Question: Put the layers of rock in order from oldest to youngest.
Notepack 19 AIM: How can we tell the age of rocks? Do Now: Regents Question: Put the layers of rock in order from oldest to youngest. Geological Time Geological Time refers to time as it relates to the
A Trip Through Geologic Time
Date Class _ A Trip Through Geologic Time Chapter Test A Multiple Choice Write the letter of the correct answer on the line at the left. 1. Late in the Paleozoic Era, the supercontinent Pangaea formed.
Lecture Title ( Fossils ) & Date. Main Ideas/Lecture Topics/Questions. Big Ideas or Chunking the Lecture
Lecture Title ( Fossils ) & Date Main Ideas/Lecture Topics/Questions Big Ideas or Chunking the Lecture Fossil Trilobites Point of View #1 Natural selection provides a scientific explanation for the fossil
NOTES 1. Fossils. The BIG Idea Rocks, fossils, and other types of natural evidence tell Earth s story.
Name Period Date UNIT 6 NOTES 1 Fossils Objectives Identify and describe the types of fossils. Define fossils Explain fossil formation Explain how different kinds of fossils show traces of life from Earth
Hard Parts of Organisms: Bones Shells Hard Parts of Insects Woody Material (trunks) Fossils provide evidence of how life has changed over time.
PLEASE, PICK UP OUTLINE FROM THE FRONT TABLE! *recommend adding the extra stuff to the notes Fossus - means to dig up Fossils are preserved remains or traces of living things. Most fossils form when living
7.1 Life in the past. Fossil formation
7 The drawing shows an artist s impression of a number of dinosaurs ancient reptiles that lived in eastern Australia about 100 million years ago. From your knowledge of modern-day animals, what evidence
Evidence for Evolution Notes:
Evidence for Evolution Notes: Evidence that supports the theory of evolution is usually grouped into four main areas, such as 1. Biochemical DNA analysis 2. Comparative anatomy morphology, homologous structures,
Directed Reading. Section: The Fossil Record. Skills Worksheet
Skills Worksheet Directed Reading Section: The Fossil Record 1. For what geological information are fossils an important source? a. learning whether rock is sedimentary, igneous, or metamorphic b. finding
6/30/2018. Geologic Time. Earth, Chapter 9 Chapter 9 Geologic Time
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Geologic Time Earth, Chapter 9 Chapter 9 Geologic Time The Importance of a Time Scale Interpreting Earth s history is an important goal of the science of
THE HISTORY OF THE EARTH EARTH SCIENCE
THE HISTORY OF THE EARTH EARTH SCIENCE FOSSILS Paleontology is the study of life that existed in prehistoric times A fossil is any evidence of earlier life preserved in rock. Shells Bones Petrified trees
Name Date EARTH S HISTORY VOCABULARY
Name Date EARTH S HISTORY VOCABULARY Use Figure 2 to answer the following two questions. 10. Interpreting Graphics Which is older the sandstone layer or Dike A? Explain your answer. Conglomerate Sandstone
Lecture Outline Friday Feb. 21 Wednesday Feb. 28, 2018
Lecture Outline Friday Feb. 21 Wednesday Feb. 28, 2018 Questions? Key Points for today What are the 5 relative age dating principles and how do you apply the principles to determine a geologic history
Geologic Time Essentials of Geology, 11th edition, Chapter 18 Geologic Time: summary in haiku form Key Concepts Determining geological ages
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Geologic Time Essentials of Geology, 11 th edition, Chapter 18 Geologic Time: summary in haiku form Superposition and horizontality tell stories in rocks. Key
11/5/2015. Creating a Time Scale - Relative Dating Principles. Creating a Time Scale - Relative Dating Principles. The Geologic Time Scale
GEOL 110: PHYSICAL GEOLOGY Why is the Geologic Time Scale important? Rocks record geologic and evolutionary changes throughout Earth s history Without a time perspective, events have little meaning Chapter
Chapter 09 Geologic Time
Physical Geology 1330 116-S&R 1 Chapter 09 Geologic Time Lectures 12 & 13 Dr. Mike Murphy mmurphy@mail.uh.edu 333-S&R-1 www.uh.edu/~mamurph2/homepage.html Two Ways to Date Geologic Events 1. Relative Dating
6. Relative and Absolute Dating
6. Relative and Absolute Dating Adapted by Sean W. Lacey & Joyce M. McBeth (2018) University of Saskatchewan from Deline B, Harris R, & Tefend K. (2015) "Laboratory Manual for Introductory Geology". First
Fossils, 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
Paleo Lab #5 - Fossilization and Fossil Identification
Paleo Lab #5 - Fossilization and Fossil Identification page - INTRODUCTION The objectives of this exercise are to understand what fossils are, to recognize the different styles of fossil preservation,
Relative aging, fossils, natural disasters
Relative aging, fossils, natural disasters Rocks breaking down into smaller pieces Water that moves over Earth s surface Causes sheet erosion Moves downhill Forms rills and gullies Erosion creates valleys,
The History of Life. Section 3-2. The Fossil Record
The History of Life Section 3-2 The Fossil Record The History of Life Draw a line that has as many inches as you have years. Mark the years at every inch. For each year, record at least one major event
Station 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
2. How do igneous rocks form? 3. How do sedimentary rocks form? 4. How do metamorphic rocks form?
Name: Class: Earth s History Test Review Packet Test: Monday, February 13, 2017 The Rock Cycle 1. Explain why it is called the rock CYCLE. Does it truly have a starting point or end point? 2. How do igneous
Final Revision G8 Biology ( ) Multiple Choice Identify the choice that best completes the statement or answers the question.
Final Revision G8 Biology ( 2017-2018 ) Multiple Choice Identify the choice that best completes the statement or answers the question. 1 A species is a group of similar organisms that A can mate with each
STUDY GUIDE CHAPTERS 12 & 13 GEOLOGIC TIME CHAPTER 12 SECTION 12.1
NAME PERIOD DATE STUDY GUIDE CHAPTERS 12 & 13 GEOLOGIC TIME CHAPTER 12 SECTION 12.1 1. WHAT IS THE PRINCIPLE OF UNIFORMITARIANISM PUT FORWARD BY JAMES HUTTON IN THE LATE 1700 s? 2. HOW DID UNIFORMITARIANISM
Fossils. Who studies fossils? How do fossils form? Fossils are the preserved remains or traces of living things.
Fossils Essential Questions: What are fossils and how are they formed? What are the different kinds of fossils? What do fossils tell about how organisms have changed over time? Who studies fossils? Scientists
Unit 2 Lesson 1 Geologic Change over Time. Copyright Houghton Mifflin Harcourt Publishing Company
Been There, Done That What is the principle of uniformitarianism? The principle of uniformitarianism states that geologic processes that happened in the past can be explained by current geologic processes.
Tales of the Past. Source: Sci-ber Text with the Utah State Office of Education
Tales of the Past Source: Sci-ber Text with the Utah State Office of Education http://www.uen.org/core/science/sciber/trb4/downloads/literacy4.pdf Do you like mystery and intrigue? Do you like to do detective
Body Fossils are preserved remains where an organism's body tissue, or parts thereof, become fossilized in an altered or actual state.
TYPES OF FOSSILS By: Scott Marlowe Paleontology science essentially studies two principle fossil types: Body Fossils are preserved remains where an organism's body tissue, or parts thereof, become fossilized
9. RELATIVE AND RADIOMETRIC AGES
LAST NAME (IN CAPS): FIRST NAME: Instructions: 9. RELATIVE AND RADIOMETRIC AGES Your work will be graded on the basis of its accuracy, completion, clarity, neatness, legibility, and correct spelling of
Earth Science 11: Geologic Time Unit
Earth Science 11: Geologic Time Unit Text: Chapters 8 Lab: Exercise 6 Name Earth Science 11: Geologic Time Page 1 Geology 12: Geologic Time 8.1: The Geologic Time Scale Today, we know that Earth is approximately
Strata Sample. 1. Make a drawing of the strata sample (beaker) in your fold. Be sure to add color :)
strata: layer of sedimentary rock/soil Strata Sample 1. Make a drawing of the strata sample (beaker) in your fold. Be sure to add color :) 2. Identify which layer is the OLDEST and which layer is the YOUNGEST
Determining Absolute Age
CHAPTER 8 SECTION 2 The Rock Record Determining Absolute Age KEY IDEAS As you read this section, keep these questions in mind: Why can t scientists use rates of erosion and deposition as the only ways
TOPIC 1: RELATIVE DATING ESSENTIAL QUESTION: HOW DO WE DETERMINE A ROCK S AGE BY THE SURROUNDING ROCKS?
TOPIC 1: RELATIVE DATING ESSENTIAL QUESTION: HOW DO WE DETERMINE A ROCK S AGE BY THE SURROUNDING ROCKS? TOPIC 1: RELATIVE DATING UNIFORMITARIANISM: THE IDEA THAT THE SAME FORCES HAVE BEEN AND CONTINUE
Do Now HW due Friday 9/30
Do Now HW due Friday 9/30 1. Describe the process of formation of a sedimentary rock. 2. Draw out the rock cycle clearly state how each rock type becomes another rock type. 3. Make a chart and compare
Fossils: evidence of past life
Fossils: evidence of past life Remains or traces of prehistoric life Petrified Cavities and pores are filled with precipitated mineral matter Petrified Formed by replacement Cell material is removed and
The Geology of Pacific Northwest Rocks & Minerals Activity 1: Geologic Time
Name: Age: I. Introduction There are two types of geologic time, relative and absolute. In the case of relative time geologic events are arranged in their order of occurrence. No attempt is made to determine
Rock cycle diagram. Principle of Original Horizontality. Sediment is deposited horizontally
Geologic Time Rock cycle diagram Leaves of History Chapter 21 Lateral Continuity Principle of Original Horizontality Sediment is deposited horizontally Principle of Superposition Oldest rock A Younger
Hot Sync. Materials Needed Today
Materials Needed Today Please take these materials out of your backpack. Pencil Age of the Earth Research Assignment Hot Sync Tuesday 12/10/13 Answer the following questions in complete sentences on a
Geochronology. study of 'Earth time' Historical Geology. study of the physical and biological evolution of the Earth & its life
http://talc.geo.umn.edu/courses/100i/1001kirkby/ss6.html Page I of II 3/17/2006 Geochronology study of 'Earth time' time scale of geologic processes & methods of measuring time Historical Geology study
Answers 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
GEOLOGIC TIME. Smith and Pun, Chapter 7 DETERMINING THE ORDER OF EVENTS
GEOLOGIC TIME Smith and Pun, Chapter 7 DETERMINING THE ORDER OF EVENTS Examination of ancient rocks reveals the history of our planet. Sedimentary and volcanic rocks record processes that occur on the
Remains or traces of prehistoric life
Fossils: evidence of past life Remains or traces of prehistoric life Petrified Cavities and pores are filled with precipitated p mineral matter Petrified Formed by replacement Cell material is removed
Exploring Geology Chapter 9 Geologic Time
Exploring Geology Chapter 9 Geologic Time Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 9: Geologic Time Stratigraphic Principles Relative Age Dating
geologic age of Earth - about 4.6 billion years
Geologic Time Geologic Time geologic age of Earth - about 4.6 billion years Geologic Time very difficult to appreciate from our human perspective necessary to understand history of Earth two basic ways
Fossils. 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
LECTURE 2: Taphonomy and Time
1 LECTURE 2: Taphonomy and Time OUTLINE Fossils: Definition, Types Taphonomy Preservation: Modes and Biases Depositional environments Preservation potential of dinosaurs Geologic Time Scale: Relative and
Mineral - a naturally occurring, inorganic solid that has a crystalline structure and a definite chemical composition For the Love of God
Rocks & Minerals Mineral - a naturally occurring, inorganic solid that has a crystalline structure and a definite chemical composition For the Love of God A platinum cast of a skull from an actual person
Geologic Time: Concepts and Principles
Geologic Time: Concepts and Principles Introduction - An appreciation for the immensity of geologic time is essential for understanding the history of our planet - Geologists use two references for time
GEOLOGICAL TIME / DATING TECHNIQUES
DATE DUE: INSTRUCTOR: TERRY J. BOROUGHS Geology 305 NAME: SECTION: GEOLOGICAL TIME / DATING TECHNIQUES Instructions: Read each question carefully before selecting the BEST answer. Provide specific and
2. Can you name earth s three eras and explain why they are divided that way?
Unit: 3 Earth s History LT 3.1 Earth s History: I can map out a basic history of the earth, including key events. 1. Can you place the key events of earth s history in order? #1 Yes I can: 2. Can you name
Lesson Checkpoint: Name one animal that you know is extinct.
FOSSILS AND EXTINCT ANIMALS Extinct Animals Many animals have become extinct over millions of years. Extinct means that no longer living on Earth. When a species is extinct, it means there aren t any animals
Relative Dating. How do we determine a rocks age by the surrounding rocks?
Relative Dating How do we determine a rocks age by the surrounding rocks? 1 Geologic History 2 Relative Dating Uniformitarianism - the idea that forces working on our planet today worked on our planet
Geohistory Review. Things you need to know:
Geohistory Review Things you need to know: a) The earth and the solar system are 4.5 billion years old (4.5 X 10 9 ) b) Law of original horizontality: Sedimentary rock layers are always deposited as horizontal
The Environment and Change Over Time
The Environment and Change Over Time Fossil Evidence of Evolution What do you think? Read the two statements below and decide whether you agree or disagree with them. Place an A in the Before column if
The 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
Geologic Time: Hutton s Outcrop at Siccar Point
Geologic Time: How do we determine age (relative & absolute) What is the age of the earth? How do we know? Hutton s Outcrop at Siccar Point Hutton looked at this outcrop and reasoned that the Earth was
Geologic Time: Hutton s Outcrop at Siccar Point. How do we determine age (relative & absolute) What is the age of the earth? How do we know?
Geologic Time: How do we determine age (relative & absolute) What is the age of the earth? How do we know? What is the age of the Earth? A. 4.44 million years B. 1 million years C. 4.55 billion years D.
Before the 1700 s, scientists thought that the Earth was only 6,000 years old. This mindset was based on biblical references.
Before the 1700 s, scientists thought that the Earth was only 6,000 years old. This mindset was based on biblical references. However, as scientists began to better understand the processes that shape
Before the 1700 s, scientists thought that the Earth was only 6,000 years old. This mindset was based on biblical references.
Before the 1700 s, scientists thought that the Earth was only 6,000 years old. This mindset was based on biblical references. However, as scientists began to better understand the processes that shape
Rock cycle diagram. Relative dating. Placing rocks and events in proper sequence of formation Deciphering Earth s history from clues in the rocks
Geologic Time Rock cycle diagram Leaves of History Chapter 21 Modern geology Uniformitarianism Fundamental principle of geology "The present is the key to the past Relative dating Placing rocks and events
Determining geological ages
Determining geological ages Relative ages placing rocks and geologic events in their proper sequence, oldest to youngest. Absolute dates define the actual numerical age of a particular geologic event.