Question: What Are Two Pieces Of Evidence For Plate Tectonics?

What is the evidence for plate tectonics and continental drift?

Fossil Evidence 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..

How do you prove 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 was the first evidence of continental drift?

The first truly detailed and comprehensive theory of continental drift was proposed in 1912 by Alfred Wegener, a German meteorologist. Bringing together a large mass of geologic and paleontological data, Wegener postulated that throughout most of geologic time there was only one continent, which he called Pangea.

What happens when two plates collide?

If two tectonic plates collide, they form a convergent plate boundary. Usually, one of the converging plates will move beneath the other, a process known as subduction. … The new magma (molten rock) rises and may erupt violently to form volcanoes, often building arcs of islands along the convergent boundary.

What are four pieces of evidence for 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 causes of plate movement?

Convection currents, slab pull, and ridge push move Earth’s huge tectonic plates. Convection currents in the mantle are much slower than those in boiling water.

What would happen if plate tectonics stopped moving?

If all plate motion stopped, Earth would be a very different place. The agent responsible for most mountains as well as volcanoes is plate tectonics, so much of the activity that pushes up new mountain ranges and creates new land from volcanic explosions would be no more.

What is the largest tectonic plate?

Pacific plateThe Pacific plate is over 103,000,000 km2 in area. It is an oceanic plate, which is thinner than lithospheric continental plates.

How many plate tectonics are there?

Plate tectonics on Earth, at present, consists of 12 large semirigid plates of irregular shapes and sizes that move over the surface, separated by boundaries that meet at triple junctions. There are also many broad zones of deformation. The seven major plates account for 94% of the surface area of Earth.

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 are the 2 types of tectonic plates?

The two types of tectonic plates are continental and oceanic tectonic plates.

What is causing the 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 is the evidence for Pangea?

Evidence of existence Fossil evidence for Pangaea includes the presence of similar and identical species on continents that are now great distances apart.

What is the fastest moving plate?

The Cocos and Nazca plates (in the pacific ocean) are right now the quickest, moving at over 10 cm/yr. However typical plate movements are less quick, at rates about 2-3 cm/yr.

What are 5 pieces of evidence that support 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.