- Why was Wegener’s theory largely dismissed?
- When was Wegener’s theory accepted?
- Why was Pangea not accepted?
- What are 3 pieces of evidence for Pangea?
- How fast did Pangea break apart?
- Is Wegener’s theory about the earth credible and believable?
- How did Pangea split?
- What did Earth look like before Pangea?
- What is the force that moves the continents?
- Is the Continental Drift Real?
- Why dont the shape of the continents fit perfectly into a supercontinent?
- Why did scientists disagree with Alfred Wegener?
- What are the 4 pieces of evidence for continental drift?
- Where is Earth’s heat energy most concentrated?
- Did dinosaurs live on Pangea?
- What is the best piece of evidence for plate tectonics?
- What was the response to Wegener’s hypothesis?
Why was Wegener’s theory largely dismissed?
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..
When was Wegener’s theory accepted?
1912The first truly detailed and comprehensive theory of continental drift was proposed in 1912 by Alfred Wegener, a German meteorologist.
Why was Pangea not accepted?
Despite having this geological and paleontological evidence, Wegener’s theory of continental drift was not accepted by the scientific community, because his explanation of the driving forces behind continental movement (which he said stemmed from the pulling force that created Earth’s equatorial bulge or the …
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.
How fast did Pangea break apart?
For 40 million years, the plates that made up Pangaea moved apart from each other at a rate of 1 millimetre a year. Then a shift in gear happened, and for the next 10 million years the plates moved at 20 millimetres a year. According to the new model, the continents split completely some 173 million years ago.
Is Wegener’s theory about the earth credible and believable?
Yes it was credible but it was not believable not until early 1960’s wherein the seafloor spreading was discovered which explains why the continents are moving in a certain direction. Alfred Wegener wasn’t able to provide evidence on how exactly the plates are moving or what causes the plates to move.
How did Pangea split?
During the Triassic Period, the immense Pangea landmass began breaking apart as a result of continental rifting. A rift zone running the width of the supercontinent began to open up an ocean that would eventually separate the landmass into two enormous continents.
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 is the force that moves the continents?
Today, we know that the continents rest on massive slabs of rock called tectonic plates. The plates are always moving and interacting in a process called plate tectonics. The continents are still moving today. Some of the most dynamic sites of tectonic activity are seafloor spreading zones and giant rift valleys.
Is the Continental Drift Real?
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 explained why look-alike animal and plant fossils, and similar rock formations, are found on different continents.
Why dont the shape of the continents fit perfectly into a supercontinent?
Answer Expert Verified The present shaped of the continents doesn’t fit anymore due to the changes in geography and topography of a continent or place. One of the reasons that affect its shape are erosion, earthquake, converging of plates and others.
Why did scientists disagree with Alfred Wegener?
The speculation that continents might have ‘drifted’ was first put forward by Abraham Ortelius in 1596. The concept was independently and more fully developed by Alfred Wegener in 1912, but his hypothesis was rejected by many for lack of any motive mechanism.
What are the 4 pieces of evidence for continental drift?
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.
Where is Earth’s heat energy most concentrated?
Most solar energy is absorbed at the surface, while most heat is radiated back to space by the atmosphere. Earth’s average surface temperature is maintained by two large, opposing energy fluxes between the atmosphere and the ground (right)—the greenhouse effect.
Did dinosaurs live on Pangea?
Dinosaurs lived on all of the continents. At the beginning of the age of dinosaurs (during the Triassic Period, about 230 million years ago), the continents were arranged together as a single supercontinent called Pangea. During the 165 million years of dinosaur existence this supercontinent slowly broke apart.
What is the best piece of evidence for 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 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.