What Proposed Explanations Overcame The Problem Of How The Continents Moved

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When the plates move they collide or spread apart allowing the very hot molten material called lava to escape from the mantle. When collisions occur they produce mountains deep underwater valleys called trenches and volcanoes. … The Earth is producing “new” crust where two plates are diverging or spreading apart.

How will you describe the movement of the two plates?

The movement of the plates creates three types of tectonic boundaries: convergent where plates move into one another divergent where plates move apart and transform where plates move sideways in relation to each other. They move at a rate of one to two inches (three to five centimeters) per year.

What is the hypothesis that continents move slowly is called continental?

According to Wegener’s hypothesis the continents move slowly across Earth’s surface in a process called continental drift. When the early explorers began to discover the shapes of the continents mapmakers noticed how well the shapes of North and South America fit together with Europe and Africa.

What theory states that the Earth is divided into a slowly moving plate?

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. Oceanic and continental plates come together spread apart and interact at boundaries all over the planet.

Who proposed the continental drift theory Brainly?

“scientists Alfred wegener“.

Did the edges of continents fit together?

2. If the continental boundaries of North America Europe and South America are defined as the edge of the continental shelf then those continents also fit together very well. … Evidence for “polar wandering” could be better explained with stationary poles and drifting continents.

How did Alfred Wegener try to prove that the continents of Africa and South America were once connected?

Wegener supported his theory by demonstrating the biological and geological similarities between continents. South America and Africa contain fossils of animals found only on those two continents with corresponding geographic ranges.

Who were the two scientists who proposed the theory of seafloor spreading in the early 1960s?

History of study

The idea that the seafloor itself moves and also carries the continents with it as it spreads from a central rift axis was proposed by Harold Hammond Hess from Princeton University and Robert Dietz of the U.S. Naval Electronics Laboratory in San Diego in the 1960s.

Which piece of evidence would provide the strongest support for the hypothesis that Earth’s continents were once joined?

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.

Which explanation provides support for continental drift theory?

Which explanation provides support for continental drift theory? Coal fields match up across continents. What name did Wegener give to the single large landmass composed of all continents?

What evidence exists to support the existence of Pangea quizlet?

Fossils of identical organisms were found on several continents indicating the continents were once joined. Late Paleozoic sedimentary rocks often contain extensive coal seams that were used to support the existence of Pangaea.

Which provides evidence that the continents on tectonic plates have moved away from each other in the past?

Which of the following provides evidence that the continents on tectonic plates have moved away from each other in the past? … The distribution of fossils is used as evidence for plate tectonics. The distribution of four different fossil organisms over four different continents is shown in the diagram.

Which of the following best explains why Pangea broke apart into modern day continents?

Scientists believe that Pangea broke apart for the same reason that the plates are moving today. The movement is caused by the convection currents that roll over in the upper zone of the mantle. This movement in the mantle causes the plates to move slowly across the surface of the Earth.

What is the theory stating that the Earth’s surface is composed of broken pieces?

Plate tectonics is the theory that Earth’s outer shell is divided into large slabs of solid rock called “plates ” that glide over Earth’s mantle the rocky inner layer above Earth’s core.

Which layer of the Earth is responsible for the movement?

The Earth’s crust is broken up into a series of massive sections called plates. These tectonic plates rest upon the convecting mantle which causes them to move.

Which layer of the Earth is responsible for the movement of the tectonic plates?

– Convection currents in the mantle are what causes the movement of tectonic plates. – As the extremely hot molten material from the mantle rises toward the crust it cools enough to become denser and sink back into the hotter area of the mantle.

See also what causes solar prominences

What process is believed to be most responsible for the tectonic plates moving?

Mantle dynamics gravity and Earth’s rotation taken altogether causes the plate movements. However convectional currents are the general thought for the motion.

What causes continents to move Hess?

Photo: Harry Hess argues that the continents had once been one and have drifted apart. … After much thought he proposed in 1960 that the movement of the continents was a result of sea-floor spreading. In 1962 he added a geologic mechanism to account for Wegener’s moving continents.

Which theory explains why the Earth keeps on changing?

Cause of Shifts in Earth’s Continents

The theory that explains changes in the Earth’s crust by internal forces is called plate tectonics.

What makes the plates move describe one force that causes the plates to move?

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