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Plate Teconics

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Luisa Adam

on 7 November 2015

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Transcript of Plate Teconics

Convection currents
Convection currents are a current in a fluid that results in convection. Convection currents in the magma drive plate tectonics. Heat generated from the radioactive decay of elements deep in the interior of the Earth creates magma (molten rock) in the aesthenosphere. The Mariana Trench is part of the Izu-Bonin-Mariana subduction system that forms the boundary between two tectonic plates. In this system, the western edge of one plate, the Pacific Plate, is subducted beneath the smaller Mariana Plate that lies to the west.
- The force that causes most of the plate movement is thermal convection, where heat from the Earth's interior causes currents of hot rising magma and cooler sinking magma to flow, moving the plates of the crust along with them. Plate tectonics move in a circular direction.

- There are three kinds of plate tectonic boundaries: Divergent, convergent, and transform plate boundaries. Divergent boundaries is where new crust is generated as the plates pull away from each other. Convergent boundaries is where crust is destroyed as one plate dives under another. Transform boundaries is where crust is neither produced nor destroyed as the plates slide horizontally past each other.

Plate tectonics
By: Luisa, Mariah, and Hannah
Deaf Smith, Texas
The Past
The present
Plate Boundaries
resulting features or events

The Pacific Plate is an oceanic tectonic plate that lies beneath the Pacific Ocean. At 103 million square kilometers, it is the largest tectonic plate. The Antarctic Plate is a tectonic plate containing the continent of Antarctica and extending outward under the surrounding oceans.
Plate boundary identification
One of Alfred Wegeners's theories were that continents are made up of lighter rocks that can rest on heavier rocks. This supports plate tectonics because it tells that they are floating and able to move.
- Deep ocean trenches, volcanoes, island arcs, submarine mountain ranges, and fault lines are examples of features that can form along plate tectonic boundaries. Moving and shaking of the Earth causes these features.
Video #2

Plate tectonics is the theory that the outer rigid layer of the earth ehich is the lithosphere is divided/cut into a couple of dozen "plates" that move around across the earth's surface relative to each other, like slabs of ice on a lake.
Nuclear Waste Storage For Deaf Smith, Texas
Deaf Smith, Texas
Population Density :
13/sq mi (5/km²)
At one time or another during the last 70 million years, volcanic rocks covered nearly all of the western states of Washington, Oregon, California, Nevada, Arizona, Utah, Idaho, and large parts of Montana, Wyoming, Colorado, New Mexico, and Texas. Still older volcanic rocks, now largely deformed and metamorphosed, are found in nearly every state.

Volcanic Activity:
North Texas never felt an earthquake until 2008, but since then the United States Geological Survey has recorded more than one hundred, concentrated in areas of oil and gas extraction from shale by hydraulic fracturing fracking.
Earthquake Activity:
On th left are some water sources in Texas
Full transcript