Continental drift was a theory that explained how continents shift position on Earth's surface. Set forth in 1912 by Alfred Wegener, a geophysicist and meteorologist, continental drift also.. The first truly detailed and comprehensive theory of continental drift was proposed in 1912 by Alfred Wegener, a German meteorologist. Bringing together a large mass of geologic and paleontological data, Wegener postulated that throughout most of geologic time there was only one continent, which he called Pangea Describe how rock clues were used to support the hypothesis of continental drift Wegener noticed how rock structures are very similar in several different continents, like the Apalachins in North America and Greenland showing that they could have all been in the same continent onc The theory of continental drift (famously argued by Alfred Wegener in 1921) did not become widely accepted until we could explain why and how the continents moved. The theory of plate tectonics (proposed by Samuel Warren Carey in 1958) proposed that the surface of the Earth is composed of large plates that float on liquid rock (magma) Climate Clues Wegener used continental drift to explain evidence of chanaing climates. For example, fossils of warm- weather plants were found on the island of Spitsbergen in the Arctic Ocean. To explain this, Weoener hypothesized that Spitsberoen drifted from tropical regions to the arctic
To explain this, Wegener hypothesized that Spitsbergen drifted from tropical regions to the arctic. Wegener also used continental drift to explain evidence of glaciers found in temperate and tropical areas. Glacial deposits and rock sur- faces scoured and polished by glaciers are found in South America, Africa, India, and Australia Cracks in the earth's crust, or lithosphere, as it is also known, were discovered. This was a whole new clue since it was thought that the continental crust (the crust that the continents are made.. Evidence for continental drift Wegener knew that fossil plants and animals such as mesosaurs, a freshwater reptile found only South America and Africa during the Permian period, could be found on many continents. He also matched up rocks on either side of the Atlantic Ocean like puzzle pieces. Beside above, how do glaciers prove continental drift . The four pieces of evidence for the continental drift include continents fitting together like a puzzle, scattering ancient fossils, rocks, mountain ranges, and the old climatic zones' locations
â€˘ describe evidence for the theory of continental drift. â€˘ explain the importance of continental drift in the formation of the Capitan Reef. climate clues, and rock clues. Fossils of the same animal, a Mesosaurus, have been found in both South America and Africa. The fossil fern, Glossopteris hypothesis of continental drift. Describe how rock clues were used to support the hypothesis of continental drift. Summarize the ways that fossils helped support the hypothesis of continental drift. Think Critically Why would you expect to see similar rocks and rock structures on two landmasses that were connected at one time. Applying Skill
to support his ideas about continental drift. He studied land features, fossils, and evidence of climate change. In 1915, Wegener published his evidence for continental drift in a book called The Origin of Continents and Oceans. FIGURE 11 Continental Puzzle Today's continents provide clues about Earth's history. Observing Which coastline Section 1 - Continental Drift. Describe the hypothesis of continental drift; Identify evidence supporting continental drift; Section 2 - Seafloor Spreading. Explain seafloor spreading; Recognize how age and magnetic clues support seafloor spreading; Section 3 - Theory of Plate Tectonics The idea that continental drift has taken place came up primarily because of study of fossils discovered from different corners of earth. The word 'fossil' was coined more than 500 years ago, by German scientist Georgius Agricola, though records describing fossils are much older. It actually means 'having been dug up' in its original latin form
Explain the relationship between the continents, the lithosphere, and the asthenosphere. The lithosphere is that portion of the crust and upper mantle that is rigid based on the pressure and temperature. It is thought that the convection in the mantle that drives continental drift is occurring in the asthenosphere (and lower). What new evidence led to the theory of plate tectonics At one point I was given a detailed tour of the Haystack Radio Telescope in Massachusetts. This was a fascinating tour. Haystack Observatory - Wikipedia One thing I remember applies to this question: The most accurate way to determine the exact di.. . Besides the way the continents fit together, Wegener and his supporters collected a great deal of evidence for the continental drift hypothesis. Identical rocks, of the same type and age, are found on both sides of the Atlantic Ocean. Wegener said the rocks had formed side-by-side and that the land had since. There are a number of Quizzes on the Internet that have useful, well written, scientifically accurate explanations that don't contrive to contort, manipulate and cram evidence together to fit creation science ideas. The topics for these quizzes ca.. Continental drift was a revolutionary scientific theory developed in the years 1908-1912 by Alfred Wegener (1880-1930), a German meteorologist, climatologist, and geophysicist, that put forth the hypothesis that the continents had all originally been a part of one enormous landmass or supercontinent about 240 million years ago before breaking apart and drifting to their current locations
Continental Drift. History of Wegener ' s theory. Evidence of the theory. Formation of Pangaea. Pangaea splits. Resources. The relative movement of the continents is explained by modern theories of plate tectonics.These theories describe the processes by which lithospheric plates â€” of which the visible continents are a part â€” move over the asthenosphere (the molten, ductile, upper. Theory of the Continental Drift. 1. Continents fit like Puzzle Pieces. 3. Fossils. 3. Fossils - certain fossils preserved in rocks of the same age but from different continents. Ex. Mesosaurus - small fresh water reptile. Glossopteris - plant remains found in South America, Australia, Asia and Africa
Geology We gener's best evidence for continental drift came from the kinds of rocks that make up the continents. He showed that the type of rock found in Brazil matched the rock found in western Africa. Also, limestone layers in the Appalachian Mountains of North America were exactly like the limestone in Scotland's Highlands Continental drift reduced the fraction of land in those arid areas and raised the fraction at temperate midlatitudes. From their simulations, Charboreau and her collaborators could quantify that shift in climate. At the start of the Middle Triassic, 33-50% of land had a distinctly arid climate, whereas 22-27% had a distinctly temperate. Sedimentary rocks examination showed a change in climates, and the only possible explanations are continental drift or movement of the poles. Another evidence that supports the theory of continental drift is Paeomagnetism. This is the study of the strength and direction of the Earth's magnetic field as it has changed over geologic time
continental drift sea-floor spreading Describe Wegener's theory of continental drift, and explain why it was not accepted at first. . Explain how sea-floor spreading provides a way for continents to move. . Describe how new oceanic crust forms at mid-ocean ridges. Explain how magnetic reversals provide evidence for sea-floor spreading. Restless. Describe Wegener's hypothesis of continental drift Explain how sea-floor spreading pro- vides a way for continents to move. Describe how new oceanic litho- sphere forms at mid-ocean ridges. Explain how magnetic reversals pro- vide evidence for sea-floor spreading. Terms to Learn continental drift sea-floor spreading READING STRATEG Continental Drift Hypothesis At first, continental Drift was not accepted because no one could explain how or why continents had moved. The idea was so radically different that people closed their minds to it. After Wegener's death new technology helped find more clues, and new ideas related to continental drift were developed
continental drift mantle tectonic plates 6. Models of the earth â€˘Explain how fossils give clues about the past. â€˘Explain the properties of sedimentary rocks. Starter â€˘Describe the rock cycle â€˘Explain how the rocks can change from one type to another Date: / / . 2 Fragments of continental crust are much older, with large chunks at least 3.8 billion years old found in Greenland. With clues left behind in rocks and fossils, geoscientists can reconstruct the. Describe how sound waves are used to develop a map of the features of the seafloor. Why is the oldest seafloor less than 180 million years when the oldest continental crust is about 4 billion years old? Describe the major features and the relative ages of mid-ocean ridges, deep sea trenches, and abyssal plains
The continents themselves did not actually drift; they instead were found to rest like light Styrofoam atop slabs of dense rockâ€”tectonic plates millions of square miles in size, made of silicon. Directions: In the space provided, briefly write about Pangaea and continental drift and the scientific clues that support Alfred Wegner's theory. 1. Pangaea: 2. Continental Drift: 3. Puzzle-like fit clues: 4. Fossil clues 5. Plant clues: 6. Climate clues: 7. Rock clues: 8. New ideas about continental drift developed through advanced. 4 pieces of evidence for continental drift by Alfred Wegener (An Analysis of - Evidence and Rejection of the Theory) During the second and third decades of the twentieth century, the notion of continental drift was revived, most notably by the German meteorologist and geophysicist Alfred Wegener.. Wegener put together the first comprehensive theory to describe and partially explain the. A plate that is more dense and sits lower on the mantle. . A plate that is less dense and sits higher on the mantle. Steps of Plate Tectonics Quiz (here) Content Objective: Describe the different types of plate boundaries and identify the consequences of each. POD Tuesday March 7th. . Earth Science. Plate Tectonics HS-ESS1-5 Evaluate evidence of the past and current movements of continental and oceanic crust and the theory of plate tectonics to explain the ages of crustal rocks. HS-ESS2-3 Develop a model based on evidence of Earth's interior to describe the cycling of matter by thermal convection
Paleomagnetism led the revival of the continental drift hypothesis and its transformation into theories of Sea Floor Spreading and Plate Tectonics. The regions that hold the unique record of earth's magnetic field lie along the mid-ocean ridges where the sea floor is spreading. On studying the paleomagnetic rocks on either side of the oceanic. Evidence for Continental Drift 2. Matching geologic features and rocks on different continents Mountain ranges that begin on one continent, end at the coastline, and then appear to continue on a continent across an ocean. Ex. Same rocks found in Newfoundland and Greenland Historical perspective [This Dynamic Earth, USGS] In geologic terms, a plate is a large, rigid slab of solid rock. The word tectonics comes from the Greek root to build. Putting these two words together, we get the term plate tectonics, which refers to how the Earth's surface is built of plates
Unable to explain how the continents drifted apart Years later came important observations that supported Continental Drift 1. Fossil Clues- similar fossils found in South America and Africa and others found in Africa, Australia, Fossils, Rock Clues (Mountains) 2.) Describe how rock clues were used to support the hypothesis of continental drift. 3.) Why would you expect to see similar rocks and rock structure on two landmasses that were connected at one time? 4.) Explain how the ages of the rocks on the ocean floor support the theory of seafloor spreading. 5. . Creeping more slowly than a human fingernail grows, Earth's massive continents are nonetheless on the move. October 6, 2000 -- The Earth is going to be a very different place 250 million years from now. Africa is going to smash into Europe as Australia migrates north to merge with Asia
continental . drift. Continental . drift. is the hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations. This hypothesis seemed to explain a lot of puzzling observations, including the observation of how well continents fit together 3) Both laws describe the relative ages of rocks. 4) It only works on organisms that died less than about 60,000 years ago. 5) They are both used to determine the absolute ages of rocks and fossils. 6) Ammonites existed for a relatively limited period of time. 7) continental drift 8) It was found on many continents Prior Knowledge. 1. Introduce students to the concept of continental movement and plate tectonics. Call on volunteers to tell what they know about plate tectonics. Display a globe or world map. Have students look carefully at the continents. Discuss with them how Europe, Africa, South America, and North America might fit together as puzzle pieces Continental Drift and Plate Tectonics: A Scientific Revolution of the Past 50 Years. The theory of plate tectonics demonstrates that revolutions in science are not just a thing of the past, thus suggesting that more revolutions can be expected in the future. World maps have long indicated a curious jigsaw puzzle fit of the continents The diagram shows the break-up of the super-continent Pangaea, which figured prominently in the theory of continental drift â€” the forerunner to the theory of plate tectonics. Wegener also noticed a link between the rock types and geological structures that were seen to be similar on the two sides of the Atlantic
we call continental drift. Alfred Wegener, an early proponent of the theory of continental drift, Rock structures provide another clue to the existence of Pangaea. For example, parts of the Describe how geologic evidence supports the existence of the former supercontinent Pa . ngaea. Reconstruct Pangaea by examining rock, fossil, and. The colorful rocks are bounded on the south by gray and yellow tilted layers forming snowcapped peaks of the Gros Ventre Mountains. These landscapes are the product of many natural forces acting on a variety of rock types during long or short intervals of geologic time. Each group of rocks records a chapter in the geologic story of the region # 1 Evidence Supporting Continental Drift Although Wegener did not have the answer to how or why the plates were moving, he was able to compile #2 Earthquake/Volcano Zones The most reliable clues to future quakes/volcanoes are the patterns of past earth movements. These allow Earthquakes can only start within the solid rock of the. 2.1: Alfred Wegener's Continental Drift Hypothesis. Alfred Wegener (1880-1930) was a German scientist who specialized in meteorology and climatology. His knack for questioning accepted ideas started in 1910 when he disagreed with the explanation that the Bering Land Bridge was formed by isostasy and that similar land bridges once connected.
fossils and rocks, continental shapes, and seaď¬‚oor structures to provide evidence of the past plate motions. HS-ESS1-5 Evaluate evidence of the past and current movements of continental and oceanic crust and the theory of plate tectonics to explain the ages of crustal rocks. HS-ESS2-3 Develop a model based on evidence of Earth' . by Holli RiebeekÂ· design by Robert SimmonÂ· May 9, 2006. From the oceans' depths to the polar ice caps, clues to the Earth's past climates are engraved on our planet. Sea sediments reveal how much ice existed in the world and hint at past temperatures and weather patterns Fossils provide evidence for continental drift. Lesson 1-2 Wegener observed that mountain ranges and rock formations on different continents had common origins, providing rock evidence for continental drift. Volcanic rock that is identical in chemistry and age has been found on both the western coast of Africa and the eastern coast of South. The hypothesis of continental drift gained renewed interest and, when combined with sea-floor spreading, led to the theory of plate tectonics. The history of thought about the movement of continents provides a wonderful example of how hypotheses such as continental drift and sea-floor spreading are thoroughly tested before a new theory emerges 2. Explain Alfred Wegener's Theory of Continental Drift. 3. Describe the 3 different tectonic plate boundaries. Unit 5 Topic 5, Earthquakes 1. List and draw (use arrows) 3 different types of rock movement (faults) that causes earthquakes. a) b) c) 2. What is a tsunami and how is it formed? Unit 5 Topic 6, Volcanoe
The continental drift theorystates that the continents have not always been in their present locations but have drifted there over millions of years. Wegener's first clue that the continents were in motion came from his and others' observations of world maps (Figure 12.1). 12.1 Evidence for Continental Drift Words to Know continental. Deep Time gave the history of Earth enough timeâ€”4.543 billion yearsâ€”to encompass continental drift, the evolution of species, and the fossilization process. A second Scotsman, Charles Lyell, propelled Hutton's work into his own theory of uniformitarianism , the doctrine that Earth's geologic formations are the work of slow geologic forces Today's LEQ: What evidence didAlfred Wagner use to explain his idea of continental drift?By the end of today, you should be able to1. Identify the three types of evidence used to support the concept of Pangaea and continental drift 6. Focus Vocabulary6. Continental Drift7. Pangaea 7
Explain how the following pieces of evidence supported the continental drift theory. (a) matching continental margins (b) similar animal fossils in South America and Africa (c) similar rock types and structures in North America and northern Europe (d) magnetic striping in rocks Why do earthquakes and volcanoes occur at tectonic plate boundaries This occurs at the boundary between the large accreted terrane and the pre-existing continental edge, which is known as the suture zone. The section of oceanic lithosphere that gets thrust into the suture zone is called an ophiolite --a name that comes from a Greek word for snake and refers to the green, slippery serpentinite rocks that are.
. The similarity of coastlines for different continents suggests that they may once have been connected. But the fact that they were separated by sometimes thousands of miles suggested continental drift or plate tectonics.. Taylor, the earliest proponent of plate tectonics, argued partly on the basis of the coastline matching of eastern South America and western Africa Learn how to do the Sid Shuffle as your favorite Ice Age character teaches you the moves to the coolest dance craze sweeping the globe. And don't forget to s.. Fossils found in layers of sediment give us clues to Earth's past. Based on the fossil record of this area, we can assume that this area was A) once a desert. B) once underwater. C) much colder in the past. D) located in a . Science. 1. Which statement describes the relative age of a fossil that has formed inside a layer of rock? A 4. Why was the hypothesis of Continental drift initially rejected? 5. Explain the process of sea-floor spreading: a. where does it occur? b. what evidence is there to prove its existence? c. where are you likely to find the oldest and youngest rocks? 6. Describe the different mechanisms for plate movements: a. where is the origin of Earth's.
The Continental Drift Hypothesis In 1912, Alfred Wegener, a German scientist, observed the fit of the continents and arrived at a creative explanation for this pattern. What did he conclude? GO ONLINE Watch the video Wegener's Hypothesis. Then answer the questions that follow. 2. What was Pangaea? Describe Wegener's continental drift hypothesis It looks like just another rock, but what researchers are examining is a four-billion-year-old chunk of an ancient protocontinent that holds clues about how Earth's first continents formed. Continents today form when one tectonic plate shifts beneath another into Earth's mantle and cause magma to rise to the surface, a process called subduction Early Evidence: Fossils and Puzzle Pieces. Plate tectonics is a relatively new theory. It was first proposed in 1912 by Alfred Lother Wegener as a theory called continental drift. Wegener's theory was initially based upon the remarkable shape of our continents, particularly South America and Africa. He spent his life traveling around the. 12. Plate Tectonics 1 (20 points) Circle the word in ( ) that best completes each statement. a. The surface of the Earth is (broken, stitched together) into large, interconnected (plates, life-vests) which float on a layer of molten (rock, caramel) in the mantle. This is the theory of plate (tectonics, technology). Volcanoes and earthquakes occur where plates (meet, have dinner) Identify the various evidence that shows continental drift. Show how the positions of the landmasses have changed and have also been connected into a single supercontinent. Explain the driving mechanism behind the movement of Earth's lithospheric plates. Describe how plate tectonics causes stress in the crust that creates different feature
without continental drift, this pattern of fossils would be hard to explain. In addition to fossils, similar types of rock and evidence of the same ancient climatic conditions were found on several continents. Figure 1 Fossils of Mesosaurus, a small, aquatic reptile, and Glossopteris, an ancient plant species, have been found on several continents end of this continental drift theory lesson plan students will be able to describe the historical developments that support the plate tectonic theory each lesson is designed using the 5e method of instruction to ensure maximum comprehension by the students, purchase a copy of the relative datin
The continental shield is usually near the center of the continent and consists of the most ancient igneous and metamorphic rocks; in fact, it's within these continental shields that we find the oldest rocks anywhere on Earth. They may be as old as 3. 6 billion years old. That means that they're about three quarters as old as the Earth itself The Theory Of Plate Tectonics And Continental Drift 950 Words | 4 Pages. The concept of plate tectonics is that the lithosphere, which is the higher layers of the Earth's surface, is separated into a number of plates that float independently over the mantle and along the boundaries that initiate the development of new crust, the building of mountains, and the seismic movement that triggers. Wegener thought continental drift was the key to these climatic puzzles, so he and Vladimir Koppen plotted ancient deserts, jungles, and ice sheets on paleogeographic maps based on Wegener's theory. Suddenly the pieces of the puzzles fell into place, producing simple, plausible pictures of past climates Types of Glaciers (note: images of these features are shown in your textbook and will be shown in class.) Mountain Glaciers. - Relatively small glaciers which occur at higher elevations in mountainous regions.. Smallest of these occupy hollows or bowl-shaped depressions on sides of mountains (cirque glaciers).As cirque glaciers grow larger they may spread into valleys and flow down the valleys.
Evolutionary Patterns, Rates, and Trends Chapter 1