More evidence comes from glacial striations - scratches on the bedrock made by blocks of rock embedded in the ice as the glacier moves these show the direction of the glacier, and suggest the ice flowed from a single central point. Did a collision with a giant asteroid or comet change the shape of life on earth forever it is widely agreed that such an object -- 10 kilometers across -- struck just off the coast of the. Continental drift is caused by heat deep in the planet, driving the convection of material in the earth's mantle the eight major and numerous minor tectonic plates on the planet's surface are. 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. In this continental drift and fossils worksheet, students complete a puzzle of the continents and they answer questions about fossils, the layers of the earth's crust, wegener's continental drift theory and the major plates.
Rock evidence for continental drift exists in the form of several mountain belts that end at one coastline, only to reappear on a landmass across the ocean for example, the appalachian mountain belt runs northeastward through. Wegener's theory of continental drift was not accepted immediately by other scientists because the fossil evidence was unreliable. Continental drift theory continental drift is the hypothesis that all the continents had once been joined together in a single landmass alfred wegener named this supercontinent pangaea pangaea existed about 300 million years ago this was the time when reptiles and winged insects first appeared.
Alfred wegener's fossil evidence for continental drift is shown on the cut-outs 3 try to logically piece the continents together so that they form a giant supercontinent. Paleomagnetism and continental drift by the mid twentieth century enough evidence had been amassed to begin openning the minds of many scientists to the idea that the continents could have moved across the surface of the earth. Continental drift, sea floor spreading and plate tectonics plate tectonics is a theory developed in the late 1960s, to explain how the outer layers of the earth move and deform. Alfred lothar wegener was a meteorologist and geophysicist best known for his theory of continental drift, according to which earth's continents once formed a single landmass and over time drifted to their present positions. Section 3 assessment section summary review and reinforce enrich target reading skill identifying supporting evidence refer to your graphic organizer about continental drift as you answer question 2 below.
Alfred wegener was the developer of a new theory of the earth's surface called continental drift, and he was an adept investigator, but he passed away in 1930 with his theories generally dismissed. The history of science is littered with theories that were accepted but, little by little, evidence accumulated that cast doubt on the original theory and pointed the way to a new. Continental drift emphasizes the jig-saw puzzle feature of the continents, whereby the continent of south america, along its eastern coastline, pulled away from the western coastline of the continent of africa between 250 and 385 million years ago.
The continental drift hypothesis was developed in the early part of the 20th century, mostly by alfred wegener wegener said that continents move around on earth's surface and that they were once joined together as a single supercontinent. Continental drift is caused by movement of the tectonic plates that continents sit on top of continental drift has continuously occurred throughout time, and continues to do so today rough estimates say that europe and north america are drifting away from each other 25 centimeters per year the. Continental drift and mountain building wegener put forward his theory of continental drift in 1912 stating that the continents were once joined together and were drifting apart dismissing the theory of connecting land bridges. Holmes knew his hypothesis to continental drift theory needed to necessitate more evidence in order to either disprove or prove holmes was solely looking for the primary mechanism to explain how identical geological and biological evidence could occur on two different continents across an ocean.
Continental drift is the theory that the earth's continents have moved over geologic time relative to each other, thus appearing to have drifted across the ocean bed the speculation that continents might have 'drifted' was first put forward by abraham ortelius in 1596. What evidence is there for continental drift as early as 1596, the dutch map maker abraham ortelius suggested that the americas, eurasia and africa were once joined and have since drifted apart by earthquakes and floods his evidence was the jigsaw fit of the continents. Evidence for continental drift: fit of the continents it was the amazingly good fit of the continents that first suggested the idea of continental drift.