Plate Tectonic Theory

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by VivianTina14
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Plate Tectonic Theory

Plate Tectonic Theory


The Theory of the plate tectonics states that the Earth's outermost layer, the lithosphere, is broken up into about a dozen or more small and large plates that travel across relative to one another. As they move, the plates get hotter and they are able to move around more freely. Back then, people thought the Earth was one large continent and then broke up into large pieces. The one large continent was known as Pangea.

C- The Earth's lithospere is made up of the crust, mantle, inner core, outer core, oceanic crust, continental crust, and the lithosphere's rock contains igneous, sedimentary, and metamorphic.These tectonic plates move a little bit every year as they slide on top of the mantle called the asthenosphere. All this moving of rocks can cause earthquakes.

E- Canyons, Mountain Ranges, and Trenches are some features that can be observed from space.

D- Convergent~ These boundaries form mountains, which occur when two plates collide together.Divergent~ These boundaries form trenches, which occur when two plates move away from eachother.Transform~ These boundaries form earthquakes, which occur when two plates move past eachother forming fault lines.

Tina Le & Vivian Tran

B- In 1960, scientific discoveries about seafloor spreading, a process which new ocean floor is created as molten materials from the earth mantel rises in margins between plates or ridges and spreads out, combined with the theory of continental drift, developed and led to the theory of plate tectonics.

A- Alfred Wegener developed the theory in 1912. The early theory of continental drift stated, the world was made up of one single continent. That continent eventually seperated and drifted apart, forming the seven continents we have today.

A- What was the early theory of continental drift; who developed it, and when was it developed?B- What was the discoveries that led to a theory of plate tectonics, and when were these discoveries made?C- What is Earth's lithosphere made of, and how does it affect crustal features?D- What features of Earth's crust do convergent, divergent, and transform boundaries form?E- What land features formed by the movement of tectonic plates can be observed using images form space?


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