what is the theory of plate tectonics quizlet

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.

Is plate tectonics a theory or fact?

The plate movements first proposed under the theory of continental drift hypothesis rapid and sudden massive movements of the continents in the past. … Because Plate Tectonics explains things it is a theory, Because it does not provide a means of calculation precisely when and where the plates will move it is not a law.

What is the theory of plate tectonics combines which two other theories?

In fact, plate tectonics actually combine two other theories, continental drift and seafloor spreading into a comprehensive global theory. It’s curious that the continents on opposite sides of the Atlantic Ocean fit together so well, almost like a jigsaw puzzle.

How does the plate tectonics theory explain earthquakes?

Earthquakes occur along fault lines, cracks in Earth’s crust where tectonic plates meet. They occur where plates are subducting, spreading, slipping, or colliding. As the plates grind together, they get stuck and pressure builds up. Finally, the pressure between the plates is so great that they break loose.

Who introduced the theory of plate tectonic?

meteorologist Alfred Wegener
German meteorologist Alfred Wegener is often credited as the first to develop a theory of plate tectonics, in the form of continental drift.

What is the name of the theory that led to the development of the theory of plate tectonics?

Plate tectonic theory had its beginnings in 1915 when Alfred Wegener proposed his theory of “continental drift.” Wegener proposed that the continents plowed through crust of ocean basins, which would explain why the outlines of many coastlines (like South America and Africa) look like they fit together like a puzzle.

What is the difference between plate tectonics and tectonic plates?

Plate tectonics is a scientific theory that describes the large-scale motion of Earth’s lithosphere. … The lateral relative movement of the plates typically varies from zero to 100 mm annually. Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust.

What is the meaning lithosphere?

The lithosphere is the solid, outer part of the Earth. The lithosphere includes the brittle upper portion of the mantle and the crust, the outermost layers of Earth’s structure. It is bounded by the atmosphere above and the asthenosphere (another part of the upper mantle) below.

What is the place called where tectonic plates interact?

Tectonic plates interact with each other at places called plate boundaries. … During their motion, these plates interact with each other at plate boundaries. There are three types of tectonic plate boundaries: divergent boundaries, convergent boundaries and transform boundaries.

Which of the following best describes the relationship between Earth’s crust and tectonic plates?

Once it reaches Earth’s surface, magma is called lava. Which of the following best describes the relationship between Earth’s crust and tectonic plates? Earth’s crust is one large tectonic plate. Earth’s crust is found between the outer core and tectonic plates.

What are the 5 evidence that supports the theory of plate tectonics?

There is variety of evidence that supports the claims that plate tectonics accounts for (1) the distribution of fossils on different continents, (2) the occurrence of earthquakes, and (3) continental and ocean floor features including mountains, volcanoes, faults, and trenches.

Why plates are moving explain?

Plates at our planet’s surface move because of the intense heat in the Earth’s core that causes molten rock in the mantle layer to move. It moves in a pattern called a convection cell that forms when warm material rises, cools, and eventually sink down. As the cooled material sinks down, it is warmed and rises again.

Which observations about landforms best supports the theory of plate tectonics?

Which of the following observations about landforms best supports the theory of plate tectonics? Impact craters have been found both on dry land and on the ocean floor. As lava cools on Earth’s surface, it forms a variety of igneous rocks. Volcanoes are distributed randomly on every continent.

What are tectonic plates Class 10?

Complete Answer: The tectonic plates are pieces of Earth’s crust and the uppermost mantle which is together referred to as the lithosphere. The major tectonic plates comprises the bulk of the continents and the Pacific Ocean.

What are tectonic plates short answers 7?

The crust of the earth is completely made of rocks and hence it is called the lithosphere. The lithosphere is broken into several rocky plates which are called tectonic plates. They form the continents and the beds of the oceans. They are called continental and oceanic plates respectively.

What are tectonic plates composed of *?

oceanic lithosphere
Tectonic plates are composed of the oceanic lithosphere and the thicker continental lithosphere, each topped by its own kind of crust.

What is the theory of plate tectonics GCSE geography?

Where convection currents converge, plates move towards each other, plates converge and the plates move together, also known as ridge push. The movement of the plates, and the activity inside the Earth, is described as the theory of plate tectonics.

What is a tectonic plate GCSE?

Tectonic plates are sections of the Earth’s solid crust that “float” on top of the mantle. The mantle contains hot molten rock (magma) heated by energy from the earth’s core. The earth’s crust is made up of seven main tectonic plates and numerous smaller plates. There are two main types of tectonic plate.

What is plate tectonic theory a level?


what is the theory of plate tectonics quizlet



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