- What was a weakness in Wegener’s theory?
- What causes seafloor spreading?
- What are the 4 evidence of continental drift?
- What was the major problem with Wegener’s ideas?
- When was Wegener’s theory accepted?
- Why was Pangea not accepted?
- What was the response to Wegener’s hypothesis?
- What is the evidence for seafloor spreading?
- What is the force that moves the continents?
- Why did Wegener’s theory take more than 50 years?
- Who discovered seafloor spreading?
- Why did other scientists disagree with Wegener?
What was a weakness in Wegener’s theory?
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 causes seafloor spreading?
Sea-floor spreading is what happens at the mid-oceanic ridge where a divergent boundary is causing two plates to move away from one another resulting in spreading of the sea floor. As the plates move apart, new material wells up and cools onto the edge of the plates.
What are the 4 evidence of continental drift?
They based their idea of continental drift on several lines of evidence: fit of the continents, paleoclimate indicators, truncated geologic features, and fossils.
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.
When was Wegener’s theory accepted?
Wegener first presented his theory in lectures in 1912 and published it in full in 1915 in his most important work, Die Entstehung der Kontinente und Ozeane (The Origin of Continents and Oceans).
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 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 is the evidence for seafloor spreading?
Several types of evidence supported Hess’s theory of sea-floor spreading: eruptions of molten material, magnetic stripes in the rock of the ocean floor, and the ages of the rocks themselves. This evidence led scientists to look again at Wegener’s hypothesis of continental drift.
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.
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.
Who discovered seafloor spreading?
Harry HessHarry Hess: One of the Discoverers of Seafloor Spreading main content.
Why did other scientists disagree with Wegener?
The lack of a mechanism for Continental Drift was the excuse for the scientific community to reject the theory of Continental Drift. There was sufficient evidence at the time for the theory to be accepted. The contradictions to accepted theories was perhaps the main reason Continental Drift was rejected.