What Provides Evidence For Plate Tectonics


What Provides 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.

What are three pieces of evidence for 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.

What evidence supports plate tectonics quizlet?

Earthquakes and volcanic activity are also evidence of plate tectonics.

Who is the first to provide evidence 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 provides evidence for continental drift and plate tectonics?

Fossil Evidence

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One type of evidence that strongly supported the Theory of Continental Drift is the fossil record. 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.

Which evidence provides support for the motion of Earth’s tectonic plates being predictable?

Sea Floor Magnetism. Stripes of magnetic material in the seafloor provide strong evidence for tectonic theory. The stripes alternate between those with magnetic material orientated toward magnetic north and those oriented in the opposite direction.

How do earthquakes prove plate tectonics?

Where plate pull apart slide by each other or collide there is tectonic activity manifested as earthquakes. The great majority of seismicity on the planet occurs at plate boundaries although intra-plate seismicity can occur as well when stresses build up in the plate.

Which of the following provides evidence that supports the 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.

How does Hawaii show evidence of tectonic activity?

The islands of Hawai’i are still being shaped by shifts of its tectonic plate the Pacific Plate. This causes magma to gusher out of volcanoes as lava like this eruption on the Big Island of Hawai’i. … The Hawaiian Islands were literally created from lots of volcanoes—they’re a trail of volcanic eruptions.

How does the Earth’s magnetic field provide evidence for plate tectonics quizlet?

– As constructive plates add new rock to the surface this could and magnetic minerals within the rocks aligns itself with the direction of the earth’s magnetic field. … The stripes are older the further away from the mid ocean ridge you go which shows the plates are moving apart.

Who contributed to the theory of plate tectonics?

Alfred Wegener
The “Father of Plate Tectonics” Alfred Wegener proposed “Continental Drift” in 1912 but was ridiculed by fellow scientists.

What supports Wegener’s theory of plate tectonics?

Theory of Plate Tectonics was established by Alfred Wegener. Fossils and Mountain ranges were his evidences. Alfred Wegener created the idea of continental drift and wrote ‘The Origin of Continents and Oceans’ to support his idea. … Fossils are the stongest evidences of plate tectonics.

What are the 4 pieces of evidence for continental drift?

The four pieces of evidence for the continental drift include continents fitting together like a puzzle scattering ancient fossils rocks mountain ranges and the old climatic zones’ locations.

How do fossils provide evidence of continental drift quizlet?

fossils provide evidence for continental drift because there was fossils from the same animals and plants found on different continents. around the coast of the two continents fossils were found on what would have been connected. deposits of coal have been found beneath the ice of antarctica.

What are evidence of seafloor spreading?

Evidence of Sea Floor Spreading. Harry Hess’s hypothesis about seafloor spreading had collected several pieces of evidence to support the theory. This evidence was from the investigations of the molten material seafloor drilling radiometric age dating and fossil ages and the magnetic stripes.

What drives plate tectonics?

The driving force behind plate tectonics is convection in the mantle. Hot material near the Earth’s core rises and colder mantle rock sinks.

What do we see in Earth’s topography that shows evidence of plate movement?

Ocean topography also provided evidence of plate tectonic theory. … Geoscientists later identified the mountainous features as the mid-oceanic ridges (MORs) where new plates form and the deep ocean trenches as subduction zones where plates descend into the subsurface.

Which theory provides the most acceptable cause of plate movement?

Although this has yet to be proven with certainty most geologists and geophysicists agree that plate movement is caused by the convection (that is heat transfer resulting from the movement of a heated fluid) of magma in Earth’s interior. The heat source is thought to be the decay of radioactive elements.

How tectonic plates are formed?

Continual diving of crust into mantle is sufficient to explain formation of plate boundaries. … The plates — interlocking slabs of crust that float on Earth’s viscous upper mantle — were created by a process similar to the subduction seen today when one plate dives below another the report says.

How are volcanoes formed by plate tectonics?

On land volcanoes form when one tectonic plate moves under another. Usually a thin heavy oceanic plate subducts or moves under a thicker continental plate. … When enough magma builds up in the magma chamber it forces its way up to the surface and erupts often causing volcanic eruptions.

How seismic waves provide information about the interior of the earth?

Knowing how the waves behave as they move through different materials enables us to learn about the layers that make up the Earth. Seismic waves tell us that the Earth’s interior consists of a series of concentric shells with a thin outer crust a mantle a liquid outer core and a solid inner core.

What are the 5 evidences of continental drift?

Theory of the Continental Drift
  • Continents fit like Puzzle Pieces.
  • Fossils. Fossils – certain fossils preserved in rocks of the same age but from different continents. Ex. …
  • Coal Beds. Found fossils of trees that normally grow in temperate areas but today are in a polar climate. Ex. …
  • Rocks. Rocks. Ex. …
  • Climate. Show full text.

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Which of the following provides evidence for the existence of Pangea?

Explain how fossils provided evidence for the existence of Pangaea? Fossils of plants animals and polled have been found on continents far away from eachother. For example the Mesosaurus has been found in Brazil and Africa.

Which of the following provides evidence that the continents were once connected?

Matching rock type and rock formations can show the way the continents were once attached. Glacial evidence has been found in areas where glaciers could exist if the continents were in their current location. … Fossils of the same plants and animals are found on widely separated continents.

How are islands formed plate tectonics?

When tectonic plates are pushed and pulled apart they form volcanoes causing eruptions when the plates are pulled apart. As hot magma rises from the crevasses created it eventually builds up to form islands.

How were Hawaiian Islands formed plate tectonics?

The Hawaiian Islands were formed by such a hot spot occurring in the middle of the Pacific Plate. While the hot spot itself is fixed the plate is moving. So as the plate moved over the hot spot the string of islands that make up the Hawaiian Island chain were formed.

Where are volcanoes found?

Sixty percent of all active volcanoes occur at the boundaries between tectonic plates. Most volcanoes are found along a belt called the “Ring of Fire” that encircles the Pacific Ocean. Some volcanoes like those that form the Hawaiian Islands occur in the interior of plates at areas called “hot spots.”

How does Earth’s magnetic field prove plate tectonics?

One of the key pieces of evidence supporting plate tectonic theory was the discovery that rocks on the seafloor record ancient reversals of the Earth’s magnetic field: as rocks are formed where plates are moving away from one another they record the current direction of the Earth’s magnetic field which flip-flops …

How does the fact that Earth has a magnetic field help provide evidence for the theory of plate tectonics?

How does the fact that the Earth has a magnetic field help provide evidence for the theory of plate tectonics? Mapping the polarity reversals shows the motion of plates at the time of the reversals.

Which piece of evidence is the strongest supporter of seabed spreading and plate tectonics?

When the Earth’s magnetic field reverses a new stripe with the new polarity begins. Such magnetic patterns led to recognition of the occurrence of sea-floor spreading and they remain some of the strongest evidence for the theory of plate tectonics. The figure below includes two images of the ocean floor.

When was plate tectonics proven?

By 1966 most scientists in geology accepted the theory of plate tectonics. The root of this was Alfred Wegener’s 1912 publication of his theory of continental drift which was a controversy in the field through the 1950s.

What evidence and concepts resulted in formation of modern plate tectonics theory?

During the war the latest radar technology was used to map the seafloor. Rapidly evidence pointing to the process of seafloor spreading and effective plate motion was accumulated. After the war marine geology was developed which led to the discovery of the subduction process under the continental margins.

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What evidence did Wegener rely on in the formulation of his theory of continental drift What evidence did he lack?

Alfred Wegener in the first three decades of this century and DuToit in the 1920s and 1930s gathered evidence that the continents had moved. 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 glacial striations and what evidence do they provide?

More evidence comes from glacial striations – scratches on the bedrock made by blocks of rock embedded in the ice as the glacier moves. … These show the direction of the glacier and suggest the ice flowed from a single central point.

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Plate tectonics: Evidence of plate movement | Cosmology & Astronomy | Khan Academy

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