- What are two pieces of evidence for plate tectonics?
- Why was Continental Drift rejected?
- What evidence did Alfred use?
- What proved the theory of continental drift?
- What is the evidence for Pangea?
- What are four pieces of evidence used by Alfred?
- Are Continents still moving?
- How fast do tectonic plates move?
- What causes the tectonic plates to move?
- What are 6 pieces of evidence that support continental drift?
- What are 4 pieces of evidence for continental drift?
- What physical evidence supports the theory of tectonic plates and continental drift?
What are two pieces of evidence for plate tectonics?
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.
Some life “rode” on diverging plates, became isolated, and evolved into new species..
Why was 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.
What evidence did Alfred use?
He used fossil evidence, such as that of tropical plants found on the Arctic island of Spitzbergen. He found large-scale geographic features that matched, like the Appalachian Mountains in the United States and the Scottish Highlands, as well as rock strata in South Africa that matched those in Brazil.
What proved the theory of continental drift?
Evidence for continental drift Wegener knew that fossil plants and animals such as mesosaurs, a freshwater reptile found only South America and Africa during the Permian period, could be found on many continents. He also matched up rocks on either side of the Atlantic Ocean like puzzle pieces.
What is the evidence for Pangea?
Fossil evidence for Pangaea includes the presence of similar and identical species on continents that are now great distances apart.
What are four pieces of evidence used by Alfred?
This indicates that these continents had to be once joined together because the extensive oceans between these land masses act as a type of barrier for fossil transfer. Four fossil examples include: the Mesosaurus, Cynognathus, Lystrosaurus, and Glossopteris. Modern day representation of the Mesosaurus.
Are Continents still moving?
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. … The two continents are moving away from each other at the rate of about 2.5 centimeters (1 inch) per year.
How fast do tectonic plates move?
They move at a rate of one to two inches (three to five centimeters) per year.
What causes the tectonic plates to move?
The plates can be thought of like pieces of a cracked shell that rest on the hot, molten rock of Earth’s mantle and fit snugly against one another. The heat from radioactive processes within the planet’s interior causes the plates to move, sometimes toward and sometimes away from each other.
What are 6 pieces of evidence that support continental drift?
What are six pieces of evidence for the continental drift theory? Reptile Fossils- dinosaurs couldn’t have swam across a vast ocean. Plant Fossils- all these regions were once connected and had similar climates. Tropical plants found in Arctic- tropical plants can’t grow in cold climates.
What are 4 pieces of evidence for 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 physical evidence supports the theory of tectonic plates and continental drift?
Fossil Evidence Fossils of similar types of plants and animals in rocks of a similar age have been found on the shores of different continents, suggesting that the continents were once joined. For example, fossils of Mesosaurus, a freshwater reptile, have been found both in Brazil and western Africa.