What are the 5 evidences of continental drift theory?
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 theory before continental drift?
Continental drift describes one of the earliest ways geologists thought continents moved over time. Today, the theory of continental drift has been replaced by the science of plate tectonics.
What is continental drift theory class 11?
Continental Drift Theory It was proposed by Alfred Wegener in 1912. According to Wegener, all the continents formeda single continental mass (called PANGAEA) and meg ocean (called PANTHALASSA) surrounded the same. He argued that, around 200 million years ago, the super continent, Pangaea, began to split.
What is continental drift theory class 7?
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.
What is the Continental Drift Theory class 9?
The theory of continental drift points out that the Earth’s continents are constantly drifting away from each other. According to this theory: all the continents were one single continental mass (called a Super Continent) – Pangaea. The earth’s crust is made of up of many sections called tectonic plates.
What are the weaknesses of the continental drift theory?
Drawbacks of Continental Drift Theory Forces like buoyancy, tidal currents and gravity are too weak to be able to move continents. Modern theories (Plate Tectonics) accept the existence of Pangaea and related landmasses but give a very different explanation to the causes of drift.
What is wrong with the Pangea theory?
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 …
Why is continental drift theory 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.
Is Pangea a theory?
Pangea’s existence was first proposed in 1912 by German meteorologist Alfred Wegener as a part of his theory of continental drift. Its name is derived from the Greek pangaia, meaning “all the Earth.”