The second line of evidence came from geodesythe science of the. Evidence of continental drift pdf free download as pdf file. However, continental drift was more than just a theory of paleoclimate change. Ironically, the most compelling single piece of evidence, that of the eltanin profile, was collected by an institute with a strong tradition of opposition to continental drift. Effects of continental change modern climates are a result of past movements of tectonic plates. At the time of his death in 1930, the technology needed to validate continental drift was still decades away. Continental drift theory free download as powerpoint presentation. The reason for a pdf file not to open on a computer can either be a problem with the pdf file itself, an issue with password protection or noncompliance w the reason for a pdf file not to open on a computer can either be a problem with the. Evidence in support of the continental drift qs study. Students will observe and analyze scientific evidence used by wegener.
What mountain range demonstrates one of the most visible and spectacular consequences of plate tectonics. There is also much climate evidence supporting continental drift, most notable of which is glacial activity. The theory of continental drift continental drift discovery the world alfred wegener theory of continental drift continental drift p95 red book, 182 in sciencesaurus theory that continents were once part of a single landmass that broke apart and have moved to their present locations. How to shrink a pdf file that is too large techwalla.
Searching for a specific type of document on the internet is sometimes like looking for a needle in a haystack. This means it can be viewed across multiple devices, regardless of the underlying operating system. Geologic evidence shows that ice once covered most of earths continental surfaces. In a nutshell, this theory states that the earths outermost layer is fragmented into a dozen or more large and small solid. Alfred wegeners hypothesis on continental drift and its.
If your pdf reader is displaying an error instead of opening a pdf file, chances are that the file is c. Theory of continental drift early 1500s explorers noticed the fit between africa and south america 1912 alfred wegener the idea that the continents used to form a super continent called pangea the continents then slowly drifted apart over time to their current locations used fossil evidence as well as the fact that the continents looked like puzzle pieces. Although now accepted, the theory of continental drift was rejected for many years, with evidence in its favor considered insufficient. The evidence which gave rise to the theory of continental drift more correctly called plate tectonics includes the following.
Vocabulary continental drift pangaea with the exception of events such as earthquakes, volcanic erup. The speculation that continents might have drifted was first put forward by abraham ortelius in 1596. A controversial theory in a 1912 lecture, german born meteorologist alfred wegener proposed the idea of continental drift. Students will interpret the evidence to formulate a hypothesis. It is thought that all the continents were once joined together in one supercontinent, named pangaea. Unfortunately, the evidence was gathered after wegner passed away.
Cut out each of the continental land masses along the edge of the continental shelf the outer line. The concept of continental drift is not new, but before the geophysical evidence was available, the theory was not entirely convincing. Later, seismometersinstruments that measure the motions of the groundand other technologies showed that continental drift was real. According to wegeners theory, 225 million years ago, all the land on earth was part of one huge landmass. Explain how fossil plant and animal distribution supports the continental drift idea. Lesson 2 pangaea and the theory of continental drift mr. Wegener proposed the presence of a giant continent, pangaea also spelled pangea, which literally translated means all lands. A 2 minute pbs video can be shown that explains further evidence for continental drift and plate tectonics. Continental drift theory continental drift is the hypothesis that all the continents had once been joined together in a single landmass. A teaching companion wegeners puzzling continental drift evidence u. You will be piecing together a puzzle of the supercontinent pangea based on fossil and rock evidence on the present day continents. Most electronic documents such as software manuals, hardware manuals and ebooks come in the pdf portable document format file format.
Pdf file or convert a pdf file to docx, jpg, or other file format. A joint photographic experts group jpeg image is a compressed digital copy of a photograph or a scanned image. Alfred wegener argued that the similarity in the fossils of south america and africa was evidence that the continents were once joined and had drifted apart. Explain why continental drift was not accepted when it was first proposed. Wegener explicitly presented his theory as a means to reconcile historical geology with isostasy. By michelle rae uy 24 january 2020 knowing how to combine pdf files isnt reserved. Pdf a historical account of how continental drift and plate tectonics. Look at the diagram under the continental continental information.
Continental drift theory peninsular india paleontological evidence. Pdf earth science presentation 2 continental drift 2018 definitive. On the puzzle pieces handout, assign a color to each type of fossil or mountain belt in. To combine pdf files into a single pdf document is easier than it looks. Fossil remains of plants and animals that lived in restricted areas but are now widely separated. First he dated the earth by using uranium radioactive decay to lead which incidentally supported continental drift and second he showed where. He had previously worked out two critical problems. This file is editable and leads students through an investigation of discovering evidence that supports the idea of continental drift and pangaea. How did rocks and geologic structure support the continental drift idea. Continental drift is defined as the motion of the earths continents over a defined period of time. Alfred wegener investigated this field and found an anomaly in the permocarboniferous. The paint program can help you make new image files, but it cannot open document or pdf file.
Pdf is a hugely popular format for documents simply because it is independent of the hardware or application used to create that file. Continental drift is the hypothesis that the earths continents have moved over geologic time relative to each other, thus appearing to have drifted across the ocean bed. Continental drift activity packet name instructions. There are approximately five pieces of evidence that support the theory of the continental drift. This fitting together of continents according to shape is not the only evidence supporting the past existence of pangaea. P a n g a e a north america south america africa eurasia india antarctica australia. The coasts of the continents surrounding the atlantic ocean could, if the continents were moved closer, fit together like a jigsaw puzzle. Luckily, there are lots of free and paid tools that can compress a pdf file in just a few easy steps. When it split apart it separated into two parts with the protoatlantic between them called tethys sea. Evidence of the continental drift example graduateway. One of the fun things about computers is playing with programs like paint. Other paleoclimatological evidence glacial deposit evaporite coral reef coal desert dune ice movements desert tropics glacial other paleoclimatic evidence includes deposits of coal, desert sandstone, rock salt, windblown sand, gypsum, and glacial deposits. Students will use the evidence to try to reconstruct the continents.
Theory of continental drift early 1500s explorers noticed the fit between africa and south america 1912 alfred wegener the idea that the continents used to form a super continent called pangea the continents then slowly drifted apart over time to their current locations used fossil evidence as well as the fact that the. Students will defend their position on continental drift. I discuss the evidence he found to support his theory, and why it was not accepted while he was still alive. The apparent similarity of the coastlines of africa and south america 2. An oversized pdf file can be hard to send through email and may not upload onto certain file managers. Continental drift what is, theory, evidence, stages. Alfred wegener and continental drift it was not until 1912 that the idea of moving continents was seriously considered as a fullblown scientific theory called continental drift introduced in two articles published by a 32yearold german meteorologist named alfred lothar wegener alfred lothar wegener 18801930 earned a.
Students will read and interpret maps and map symbols. Gave priority to descriptive but coherent evidence for. When continents move, the flow of air and moisture around the globe changes and causes climates to change. Ancient climatic evidencerecall from chapter 6 that sedimentary rocks provide clues to past environments and climates. The ages and types of rocks in the coastal regions of widely separated areas, such as western africa and eastern south america, matched closely. Geologists began to doubt contraction theory as an explana tion for the origins of mountains. This magnetism not only supports scientists hypotheses, it also protects us all from the dangers of solar radiation. Fossils of similar types of plants and animals in rocks of a similar age have been found on the shores of different continents, suggesting that the continents were once joined. By studying various sedimentary rocks, wegener found evidence of vast climatic changes on some continents.
Scientists made several observations that provided evidence for plate tectonics. This expedition to greenland, the waiting for new evidence in favour of his hypothesis and, finally, the outbreak of the first world war. The concept was independently and more fully developed by alfred wegener in 1912, but his hypothesis was rejected by. First he dated the earth by using uranium radioactive decay to lead which incidentally supported continental drift and second he showed where the earths heat came from radioactive decay. Wegener believed they were examples of a new theory continental drift, the gradual movement of continents across earths surface. What happens when two continents meet headon, meet headon and neither is subducted.
Continental drift was a theory that explained how continents shift position on earths surface. Scientists can observe these movements using satellite images that show, for example, that the north. One type of evidence that strongly supported the theory of continental drift is the fossil record. This article explains what pdfs are, how to open one, all the different ways. Read on to find out just how to combine multiple pdf files on macos and windows 10. It was an attempt to unify disparate elements of earth science.
The pdf format allows you to create documents in countless applications and share them with others for viewing. Adobe designed the portable document format, or pdf, to be a document platform viewable on virtually any modern operating system. Key ideass key termskey terms why it matterswhy it. What is some of wegeners evidence arguments for the continental drift.
This activity attempts to explore how changes in the model, and the evidence available, led to this change in opinion. Explain continental drift as an evidence of evolution. Continental drift and plate tectonics university of iceland. Explanation of the continental drift theory in the light of vertebrate distribution. Then read the summary below and look at the important facts from that passage. One problem was that a plausible driving force was missing.
In 1 915, wegener published his ideas in a book, on the origin ofcontinents and oceans. The puzzlelike fit of the continents, along with fossil, climate, and rock clues, were the main types of evidence supporting we geners hypothesis of continental drift. You can use the tools in paint to add something to a different document. A pdf file is a portable document format file, developed by adobe systems. Evidence for continental drift match each term with the best descriptor below. List four pieces of evidence used to support the continental drift idea. Mountain chains that ended at the coastline of one continent seemed to continue on other conti.
Continental drift and plate tectonics lets talk science. Antonio sniderpellegrini 18021885, dit antonio snider, a french. If youre looking for a more extensive lesson on pangaea, check out my newer product reuniting pangaea. They are carried by immense forces generated by convection currents in the liquid rock in the mantle of the planet. Set forth in 1912 by alfred wegener, a geophysicist, and meteorologist, continental drift also explained why lookalike animal and plant fossils, and related rock formations, are found on different continents. How does glaciation support the continental drift idea. This was the time when reptiles and winged insects first appeared. Take cornell notes 3 questions and a summary from this screencast where i cover alfred wegners theory of continental drift and pangaea. Explain the theory of evolution by natural selection. The theory of continental drift was first proposed by alfred wegener in 1912.
Polar wandering and continental drift geoscienceworld books. Evidence for plate tectonics the theory of plate tectonics is a modified version of continental drift. Evidence from rock formations geologic evidence also supported wegeners hypothesis of continental drift. Jul 03, 2015 evidence although, wegener didnt have any proof, there was evidence discovered supporting the theory by several scientists. On the puzzle pieces handout, assign a color to each type of fossil or mountain belt in the legend and color the areas on the landmasses. In this article we will discuss about continental drift. Gcse geography continental drift and pangaea teaching. Lesson 2 pangaea and the theory of continental drift.
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