Key ideass key termskey terms why it matterswhy it. 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. 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. Mountain chains that ended at the coastline of one continent seemed to continue on other conti. How to shrink a pdf file that is too large techwalla. Most electronic documents such as software manuals, hardware manuals and ebooks come in the pdf portable document format file format. By michelle rae uy 24 january 2020 knowing how to combine pdf files isnt reserved. Evidence of continental drift pdf free download as pdf file.
Look at the diagram under the continental continental information. More indepth questions can be asked during the explanation. This magnetism not only supports scientists hypotheses, it also protects us all from the dangers of solar radiation. Continental drift was a theory that explained how continents shift position on earths surface. To combine pdf files into a single pdf document is easier than it looks. 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. Unfortunately, the evidence was gathered after wegner passed away. Evidence in support of the continental drift qs study. Ancient climatic evidencerecall from chapter 6 that sedimentary rocks provide clues to past environments and climates. Fossil remains of plants and animals that lived in restricted areas but are now widely separated. Lesson 2 pangaea and the theory of continental drift. Students will read and interpret maps and map symbols. It was an attempt to unify disparate elements of earth science.
Evidence of the continental drift example graduateway. Continental drift and plate tectonics university of iceland. The second line of evidence came from geodesythe science of the. The pdf format allows you to create documents in countless applications and share them with others for viewing. 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.
Continental drift is defined as the motion of the earths continents over a defined period of time. Luckily, there are lots of free and paid tools that can compress a pdf file in just a few easy steps. He had previously worked out two critical problems. Scientists made several observations that provided evidence for plate tectonics. In a nutshell, this theory states that the earths outermost layer is fragmented into a dozen or more large and small solid. The paint program can help you make new image files, but it cannot open document or pdf file. Continental drift what is, theory, evidence, stages. The apparent similarity of the coastlines of africa and south america 2. 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. This fitting together of continents according to shape is not the only evidence supporting the past existence of pangaea. One and a half pages of a4, with pictures and diagrams, which informs of the different evidence for continental drift. 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. Continental drift theory free download as powerpoint presentation.
One type of evidence that strongly supported the theory of continental drift is the fossil record. This file is editable and leads students through an investigation of discovering evidence that supports the idea of continental drift and pangaea. The coasts of the continents surrounding the atlantic ocean could, if the continents were moved closer, fit together like a jigsaw puzzle. This activity attempts to explore how changes in the model, and the evidence available, led to this change in opinion. The evidence which gave rise to the theory of continental drift more correctly called plate tectonics includes the following. Wegener believed they were examples of a new theory continental drift, the gradual movement of continents across earths surface. At the time of his death in 1930, the technology needed to validate continental drift was still decades away. This means it can be viewed across multiple devices, regardless of the underlying operating system. Continental drift theory continental drift is the hypothesis that all the continents had once been joined together in a single landmass. The ages and types of rocks in the coastal regions of widely separated areas, such as western africa and eastern south america, matched closely. Take cornell notes 3 questions and a summary from this screencast where i cover alfred wegners theory of continental drift and pangaea. List four pieces of evidence used to support the continental drift idea. What happens when two continents meet headon, meet headon and neither is subducted.
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. A 2 minute pbs video can be shown that explains further evidence for continental drift and plate tectonics. One problem was that a plausible driving force was missing. Effects of continental change modern climates are a result of past movements of tectonic plates. Students will interpret the evidence to formulate a hypothesis.
The concept was independently and more fully developed by alfred wegener in 1912, but his hypothesis was rejected by. A teaching companion wegeners puzzling continental drift evidence u. Wegener proposed the presence of a giant continent, pangaea also spelled pangea, which literally translated means all lands. How does glaciation support the continental drift idea. According to wegeners theory, 225 million years ago, all the land on earth was part of one huge landmass. Continental drift and plate tectonics lets talk science. Antonio sniderpellegrini 18021885, dit antonio snider, a french.
Students will observe and analyze scientific evidence used by wegener. 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. Pdf a historical account of how continental drift and plate tectonics. Pdf is a hugely popular format for documents simply because it is independent of the hardware or application used to create that file. Explain why continental drift was not accepted when it was first proposed. Read on to find out just how to combine multiple pdf files on macos and windows 10. They are carried by immense forces generated by convection currents in the liquid rock in the mantle of the planet. The speculation that continents might have drifted was first put forward by abraham ortelius in 1596.
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. You can use the tools in paint to add something to a different document. Jul 03, 2015 evidence although, wegener didnt have any proof, there was evidence discovered supporting the theory by several scientists. An oversized pdf file can be hard to send through email and may not upload onto certain file managers. This article explains what pdfs are, how to open one, all the different ways. This was the time when reptiles and winged insects first appeared. 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. A joint photographic experts group jpeg image is a compressed digital copy of a photograph or a scanned image. How did rocks and geologic structure support the continental drift idea. In this article we will discuss about continental drift.
A pdf file is a portable document format file, developed by adobe systems. Then read the summary below and look at the important facts from that passage. Explain how fossil plant and animal distribution supports the continental drift idea. If youre looking for a more extensive lesson on pangaea, check out my newer product reuniting pangaea. Explanation of the continental drift theory in the light of vertebrate distribution. Wegener explicitly presented his theory as a means to reconcile historical geology with isostasy. This video describes the evidence alfred wegener used to formulate his continental drift hypothesis and examines why this idea did not gain wide acceptance w. 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. The concept of continental drift is not new, but before the geophysical evidence was available, the theory was not entirely convincing. Continental drift theory peninsular india paleontological evidence. Although now accepted, the theory of continental drift was rejected for many years, with evidence in its favor considered insufficient.
Explain continental drift as an evidence of evolution. One of the fun things about computers is playing with programs like paint. Polar wandering and continental drift geoscienceworld books. The theory of continental drift was first proposed by alfred wegener in 1912. Scientists can observe these movements using satellite images that show, for example, that the north. You will be piecing together a puzzle of the supercontinent pangea based on fossil and rock evidence on the present day continents. If your pdf reader is displaying an error instead of opening a pdf file, chances are that the file is c. Pdf earth science presentation 2 continental drift 2018 definitive. Students will defend their position on continental drift.
Lesson 2 pangaea and the theory of continental drift mr. Evidence for continental drift match each term with the best descriptor below. It is thought that all the continents were once joined together in one supercontinent, named pangaea. Evidence from rock formations geologic evidence also supported wegeners hypothesis of continental drift. Adobe designed the portable document format, or pdf, to be a document platform viewable on virtually any modern operating system. Alfred wegener investigated this field and found an anomaly in the permocarboniferous. Vocabulary continental drift pangaea with the exception of events such as earthquakes, volcanic erup. When it split apart it separated into two parts with the protoatlantic between them called tethys sea. 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. Pdf file or convert a pdf file to docx, jpg, or other file format.
First he dated the earth by using uranium radioactive decay to lead which incidentally supported continental drift and second he showed where. 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. Gcse geography continental drift and pangaea teaching. Students will use the evidence to try to reconstruct the continents. This expedition to greenland, the waiting for new evidence in favour of his hypothesis and, finally, the outbreak of the first world war. However, continental drift was more than just a theory of paleoclimate change. Searching for a specific type of document on the internet is sometimes like looking for a needle in a haystack.
Explain the theory of evolution by natural selection. Geologic evidence shows that ice once covered most of earths continental surfaces. In 1 915, wegener published his ideas in a book, on the origin ofcontinents and oceans. When continents move, the flow of air and moisture around the globe changes and causes climates to change. By studying various sedimentary rocks, wegener found evidence of vast climatic changes on some continents. Alfred wegeners hypothesis on continental drift and its. 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. What is some of wegeners evidence arguments for the continental drift. A controversial theory in a 1912 lecture, german born meteorologist alfred wegener proposed the idea of continental drift.
P a n g a e a north america south america africa eurasia india antarctica australia. Later, seismometersinstruments that measure the motions of the groundand other technologies showed that continental drift was real. I discuss the evidence he found to support his theory, and why it was not accepted while he was still alive. Continental drift activity packet name instructions. Gave priority to descriptive but coherent evidence for. Cut out each of the continental land masses along the edge of the continental shelf the outer line. Evidence for plate tectonics the theory of plate tectonics is a modified version of continental drift. There are approximately five pieces of evidence that support the theory of the continental drift. Geologists began to doubt contraction theory as an explana tion for the origins of mountains. On the puzzle pieces handout, assign a color to each type of fossil or mountain belt in. 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.
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