What Is The Difference Between Plate Tectonics And Continental Drift?

What are the 4 types of plate tectonics?

There are three kinds of plate tectonic boundaries: divergent, convergent, and transform plate boundaries.

This image shows the three main types of plate boundaries: divergent, convergent, and transform..

What is the thickness of continental plates?

40 kmContinental crust is typically 40 km (25 miles) thick, while oceanic crust is much thinner, averaging about 6 km (4 miles) in thickness. The effect of the different densities of lithospheric rock can be seen in the different average elevations of continental and oceanic crust.

Why do the tectonic plates 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.

Which of the following best explains the difference between continental drift and plate tectonics?

Which of the following best explains the difference between continental drift and plate tectonics? Continental drift describes the motion of Earth’s continents only; plate tectonics describes the motion of the crust beneath Earth’s oceans as well.

What theory came first continental drift or plate tectonics?

Although Wegener’s “continental drift” theory was later disproved, it was one of the first times that the idea of crustal movement had been introduced to the scientific community; and it laid the groundwork for the development of modern plate tectonics.

How does the tectonic plates behave?

Plates are composed of lithosphere, about 100 km thick, that “float” on the ductile asthenosphere. … The plates behave as rigid bodies with some ability to flex, but deformation occurs mainly along the boundaries between plates. The plate boundaries can be identified because they are zones along which earthquakes occur.

Which is a line 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 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 are the 3 theories of plate tectonics?

Plates interact at three types of plate boundaries: divergent, convergent and transform. Most of the Earth’s geologic activity takes place at plate boundaries. At a divergent boundary, volcanic activity produces a mid ocean ridge and small earthquakes.

Which best describes the theory of plate tectonics?

The theory of plate tectonics states that the Earth’s solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle.

Who is the father of continental drift?

Alfred WegenerAlfred Wegener: The Father of Continental Drift.

How does plate tectonics support continental drift?

The crust is broken up into giant tectonic plates that ride atop the magma, hot melted-rock material that makes up much of the interior of the Earth. Over millions of years, the continents drift into new configurations. Convection in the molten rock of Earth’s mantle drives the movement of the plates.

Which is not explained by plate tectonics?

Plate tectonics cannot explain dynamics of Earth and crust formation more than three billion years ago. Summary: The current theory of continental drift provides a good model for understanding terrestrial processes through history. … Plate tectonics is a theory of continental drift and sea floor spreading.

What is the major difference between continental drift and plate tectonics quizlet?

Terms in this set (11) What are the differences between Continental Drift and Plate Tectonics? Continental drift believes that the continents moved because the magnetism of the sea floor. Plate tectonics believes that the lithosphere & the asthenosphere of the continents caused them to move.

What was the main reason Wegener’s continental drift hypothesis was 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.