Earthquakes, volcanoes, mountain building, ice ages, landslides, floods, life evolution, plate motions—all of these phenomena have interacted over the vast expanses of deep time to sculpt the dynamic planet that we live on today. Planet Earth presents an overview of several aspects of our home, from a geological perspective. We begin with earthquakes—what they are, what causes them, what effects they have, and what we can do about them. We will emphasize that plate tectonics—the grand unifying theory of geology—explains how the map of our planet's surface has changed radically over geologic time, and why present-day geologic activity—including a variety of devastating natural disasters such as earthquakes—occur where they do. We consider volcanoes, types of eruptions, and typical rocks found there. Finally, we will delve into the processes that produce the energy and mineral resources that modern society depends on, to help understand the context of the environment and sustainability challenges that we will face in the future.
La planète Terre... et vous !
proposé par
Université de l'Illinois à Urbana-Champaign
Programme du cours : ce que vous apprendrez dans ce cours
Semaine
1Orientation
You will become familiar with the course, your classmates, and our learning environment. The orientation will also help you obtain the technical skills required for the course.
8 lectures, 1 quiz
8 lectures
Welcome to Planet Earth...and You!10 min
Syllabus15 min
Google Earth Instructions30 min
Updating Your Profile10 min
Social Media5 min
About the Discussion Forums15 min
How Graded Discussions Work10 min
Discussion Rubric10 min
1 exercice pour s'entraîner
Orientation Quiz15 min
Week 1: Earthquakes!
In the lectures for this week, we will consider what an earthquake is, how it occurs, how we can record and measure its size, and what we can do to mitigate damage. Our first weekly assignment consists of reporting your own experience with earthquakes (if any). The Week 1 Lab gives you a chance to work with seismograms, locate an earthquake epicenter, and determine magnitude. Finally, the Week 1 Discussion addresses the balance between risks from quakes and costs of preventive measures.
18 vidéos (Total 115 min), 1 lecture, 3 quiz
18 vidéos
1.A.2 Generation of Earthquake Vibrations5 min
1.A.3 Introduction to Faults4 min
1.A.4 Types of Faults5 min
1.A.5 Earthquake Waves6 min
1.B.1 The Intensity and Magnitude of Earthquakes6 min
1.B.2 Seismometers4 min
1.B.3 Interpreting Seismograms and Earthquake Magnitude4 min
1.B.4 Comparing Earthquakes5 min
1.C.1 Damage Due to Ground Shaking5 min
1.C.2 Other Consequences of Earthquakes7 min
1.C.3 Tsunamis8 min
1.D.1 The First Step in Predicting Earthquakes: Recognizing Where They Occur6 min
1.D.2 Earthquake Recurrence Interval7 min
1.D.3 Interpreting The Recurrence Interval4 min
1.D.4 Efforts to Prevent Earthquake Devastation5 min
1.D.5 Mitigating Earthquake Damage7 min
Week 1 Lab: Triangulation Lab 13 min
1 lecture
Week 1 Overview10 min
3 exercices pour s'entraîner
Week 1 Quizs
Week 1 Assignments
Week 1 Lab30 min
Semaine
2Week 2: Plate Tectonics
In the early twentieth century, publication of the hypothesis on continental drift caused an uproar that soon died down. Data collected in mid-century led geologists to reconsider the idea that continents could move. During the 1960s and 1970s, old ideas were reworked into what is now called the theory of plate tectonics. As we will see, this robust theory encompasses many geological phenomena that appear to be unrelated at first glance: earthquakes and volcanoes, but also ice ages, fossils, and mountains. Today, plate tectonics provides an overarching framework for interpreting the Earth. We study its details in Week 2, but we will return to this theory again and again throughout the rest of this course.
17 vidéos (Total 128 min), 1 lecture, 4 quiz
17 vidéos
2.A.2 Alfred Wegener & Continental Drift5 min
2.A.3 Evidence for Continental Drift6 min
2.A.4 New Discoveries Leading to Plate Tectonics: Seafloor Bathymetry10 min
2.A.5 New Discoveries Leading to Plate Tectonics: Apparent Polar-Wander Paths7 min
2.A.6 New Discoveries Leading to Plate Tectonics: Evidence for Seafloor Spreading11 min
2.B.1 Discovering Plate Tectonics4 min
2.B.2 Earth's Internal Layers and the Concept of a Plate7 min
2.B.3 Three Types of Plate Boundaries: Divergent Plate Boundary6 min
2.B.4 Three Types of Plate Boundaries: Convergent Plate Boundary6 min
2.B.5 Three Types of Plate Boundaries: Transform Plate Boundary5 min
2.B.6 Continental Rifts and Continental Collisions5 min
2.B.7 Intraplate Earthquakes6 min
2.B.8 The Velocity of Plate Motion7 min
2.B.9 Plate Driving Mechanisms7 min
Week 2 Lab: Plate Tectonics! Lab Part 111 min
Week 2 Lab: Plate Tectonics! Lab Part 214 min
1 lecture
Week 2 Overview10 min
3 exercices pour s'entraîner
Week 2 Quizs
Week 2 Assignments
Week 2 Labs
Semaine
3Week 3: Volcanoes!
This week, you will learn how and where rocks can melt, and what happens when molten material of various compositions bursts out of the ground. The lecture videos also cover different types of eruptions, as well as the rocks and mountains produced by them. In the lab, you will study details about the 1980 eruption of Mount St. Helens and the eruption of Mount Vesuvius in the year 79. The discussion forum gives you the opportunity to weigh risks to people living on or near volcanoes and what can be done to minimize damage and loss of life. The weekly assignment provides a place for you to share your own experiences with volcanoes or eruptions or, if you have never been near a volcano, your thoughts about such events.
23 vidéos (Total 149 min), 1 lecture, 3 quiz
23 vidéos
3.A.2 Where Does Molten Rock Come From?5 min
3.A.3 How Does Rock Melt?6 min
3.A.4 Forming Molten Rock; a Magma Composition5 min
3.A.5 Volcanoes Associated with Subduction5 min
3.A.6 Melting at Rifts and Mid-Ocean Ridges6 min
3.A.7 Melting at Hot Spots7 min
3.B.1 Introduction to Igneous Rocks6 min
3.B.2 What Are Igneous Rocks Composed Of?5 min
3.B.3 When Molten Rock Solidifies7 min
3.C.1 Types of Volcanic Eruptions6 min
3.C.2 Magma and Lava with Gas6 min
3.C.3 Eruption Materials6 min
3.C.4 Pyroclastic Debris4 min
3.C.5 Three Different Volcano Shapes5 min
3.C.6 Eruption Styles and Case Studies4 min
3.C.7 Case Studies of Volcanic Explosions: Pompeii, Present-Day Italy9 min
3.C.8 Super Volcanoes in the Geologic Record7 min
3.D.1 Volcanic Hazards, Part 15 min
3.D.2 Volcanic Hazards, Part 28 min
3.E.1 Predicting Volcanic Eruptions7 min
3.E.2 Dealing with Volcanic Hazards6 min
Week 3 Lab: Volcanoes! Lab Introduction 8 min
1 lecture
Week 3 Overview10 min
3 exercices pour s'entraîner
Week 3 Quizs
Week 3 Assignments
Week 3 Lab30 min
Semaine
4Week 4: Rocks and Mineral Resources
As part of the Week 4 Assignment, you will take a close look at your daily surroundings to identify Earth resources. The video lectures for the week examine various aspects of finding, extracting, and using resources such as metals and stones. For the lab, you will utilize Google Earth to examine several mining sites around the world. In the discussion, you will weigh the pros and cons of mining operations, as many communities have had to do already. This week also includes peer grading discussions, as explained on the How Graded Discussions Work page. Finally, we provide an optional assignment for those who would like to identify some common minerals.
19 vidéos (Total 141 min), 1 lecture, 4 quiz
19 vidéos
4.A.2 Origin of Earth Materials5 min
4.A.3 Defining Minerals7 min
4.A.4 Clues for Identifying Minerals8 min
4.B.1 Introducing Classes of Rocks5 min
4.B.2 The Nature of Igneous Rocks9 min
4.B.3 Different Types of Sedimentary Rocks4 min
4.B.4 Formation of Clastic Sedimentary Rocks6 min
4.B.5 Primary Sedimentary Structures and Sedimentary Basins6 min
4.B.6 Carbonate Sedimentary Rocks6 min
4.C.1 How Rocks Can Change11 min
4.C.2 Metamorphic Rocks Part 18 min
4.C.3 Metamorphic Rocks Part 27 min
4.C.4 The Rock Cycle3 min
4.D.1 The Practical Uses of Rocks8 min
4.D.2 The Nature of Metal Ore Deposits9 min
4.D.3 Global Steel Usage5 min
4.E.1 Non-Metallic Minerals – Concrete and Crushed Rock10 min
4.E.2 Other Non-Metallic Resources – Brick, Gypsum, Dimension Stone9 min
1 lecture
Week 4 Overview10 min
3 exercices pour s'entraîner
Week 4 Quizs
Week 4 Assignments
Week 4 Lab30 min
Enseignants
Dr. Stephen Marshak
Professor and Director of the School of Earth, Society, and EnvironmentDepartment of Geology
Dr. Eileen Herrstrom
LecturerGeology
À propos de Université de l'Illinois à Urbana-Champaign
The University of Illinois at Urbana-Champaign is a world leader in research, teaching and public engagement, distinguished by the breadth of its programs, broad academic excellence, and internationally renowned faculty and alumni. Illinois serves the world by creating knowledge, preparing students for lives of impact, and finding solutions to critical societal needs.
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