- What are 3 pieces of evidence for Pangea?
- What did Earth look like before Pangea?
- What was the response to Wegener’s hypothesis?
- What was the major weakness of Wegener’s theory of continental drift?
- What is the best evidence of plate tectonics?
- What ocean was formed when Pangea broke apart?
- What would happen if Pangaea wouldn’t have been broken?
- Why did scientists disagree with Alfred Wegener?
- In what way was the theory of continental drift lacking that made scientists not want to accept it?
- What are 5 pieces of evidence that support continental drift?
- What was the major problem with Wegener’s ideas?
- Who came up with the theory of seafloor spreading?
- What led to Wegener’s idea coming back into popularity?
- Why did Wegener’s theory take more than 50 years?
- Why did Pangea break up?
- Why was Wegener’s idea of continental drift rejected?
- Why did scientists argue against continental drift?
- What evidence is there that Pangea existed?
What are 3 pieces of evidence for Pangea?
Alfred Wegener, in the first three decades of this century, and DuToit in the 1920s and 1930s gathered evidence that the continents had moved.
They based their idea of continental drift on several lines of evidence: fit of the continents, paleoclimate indicators, truncated geologic features, and fossils..
What did Earth look like before Pangea?
But before Pangaea, Earth’s landmasses ripped apart and smashed back together to form supercontinents repeatedly. … Just like other supercontinents, the number of detrital zircon grains increased during formation and dropped off during breakup of Rodinia.
What was the response to Wegener’s hypothesis?
The main problem with Wegener’s hypothesis of Continental Drift was the lack of a mechanism. He did not have an explanation for how the continents moved. His attempt to explain it using tides only made things worse. But both Galileo and Darwin had serious flaws in their theories when they were first presented.
What was the major weakness of Wegener’s theory of continental drift?
A fatal weakness in Wegener’s theory was that it could not satisfactorily answer the most fundamental question raised by his critics: What kind of forces could be strong enough to move such large masses of solid rock over such great distances?
What is the best evidence of plate tectonics?
Modern continents hold clues to their distant past. Evidence from fossils, glaciers, and complementary coastlines helps reveal how the plates once fit together. Fossils tell us when and where plants and animals once existed.
What ocean was formed when Pangea broke apart?
Atlantic OceanPangea: Early Triassic Period The first oceans formed from the breakup, some 180 million years ago, were the central Atlantic Ocean between northwestern Africa and North America and the southwestern Indian Ocean between Africa and Antarctica.
What would happen if Pangaea wouldn’t have been broken?
Regions in the middle of Pangea would have lush rainforests along their borders. … This would be due to Pangea’s landmass being so large. The rain which comes from the ocean wouldn’t be able to travel far enough inland — leaving parts of Pangea practically uninhabitable by humans and other species.
Why did scientists disagree with Alfred Wegener?
Part of the reason Wegener’s ideas were not initially accepted was the misapprehension that he was suggesting the continents had fit along the current coastline.
In what way was the theory of continental drift lacking that made scientists not want to accept it?
Scientists did not accept Wegener’s theory of continental drift. … Wegener suggested that perhaps the rotation of the Earth caused the continents to shift towards and apart from each other. (It doesn’t.)
What are 5 pieces of evidence that support continental drift?
In the early part of the 20th century, scientists began to put together evidence that the continents could move around on Earth’s surface. The evidence for continental drift included the fit of the continents; the distribution of ancient fossils, rocks, and mountain ranges; and the locations of ancient climatic zones.
What was the major problem with Wegener’s ideas?
Wegener’s inability to provide an adequate explanation of the forces responsible for continental drift and the prevailing belief that the earth was solid and immovable resulted in the scientific dismissal of his theories.
Who came up with the theory of seafloor spreading?
Harry H. HessThe seafloor spreading hypothesis was proposed by the American geophysicist Harry H. Hess in 1960.
What led to Wegener’s idea coming back into popularity?
By 1930 it had been rejected by most geologists, and it sank into obscurity for the next few decades. Wegener’s impact was finally felt when his theory was resurrected as part of the theory of plate tectonics during the 1960s.
Why did Wegener’s theory take more than 50 years?
It took more than 50 years for Wegener’s theory to be accepted. One of the reasons was that it was difficult to work out how whole continents could move. It was not until the 1960s that enough evidence was discovered to support the theory fully. This slideshow explains Wegener’s theory.
Why did Pangea break up?
About 180 million years ago the supercontinent Pangea began to break up. Scientists believe that Pangea broke apart for the same reason that the plates are moving today. The movement is caused by the convection currents that roll over in the upper zone of the mantle.
Why was Wegener’s idea of continental drift rejected?
The main reason that Wegener’s hypothesis was not accepted was because he suggested no mechanism for moving the continents. He thought the force of Earth’s spin was sufficient to cause continents to move, but geologists knew that rocks are too strong for this to be true.
Why did scientists argue against continental drift?
There were two main arguments against his thesis: one centered on the fact that no one could think of a mechanism that could move the continents, while the other concerned the question of whether the data supported Wegener. Wegener advanced five pieces of evidence that supported his thesis of continental motion.
What evidence is there that Pangea existed?
The rock formations of eastern North America, Western Europe, and northwestern Africa were later found to have a common origin, and they overlapped in time with the presence of Gondwanaland. Together, these discoveries supported the existence of Pangea.