1. Plate Tectonics Vocabulary Terms Ali White 1-24-12Core1 http://www.bing.com/images/

2. Inner Core A ball of hot, solid metals It is solid. It is about 2400 km in diameter. Intense pressure makes it solid. http://www.bing.com/images/

3. Outer Core A layer of liquid metals that surround the inner core. The pressure is lower than the inner core. The metal is liquid. It is about 2300 km thick. http://www.bing.com/images

4. Mantle Hot rock that is less dense than the metallic core. It is Earth’s thickest layer. It measures nearly 2900 kilometers. It is not solid. http://www.bing.com/images

5. Crust The thin layer of rock above Earth’s mantle It is the layer we walk on It is the thinnest layer It is solid http://www.bing.com/images

6. Lithosphere The layer in Earth made up of the crust and the rigid rock of the upper mantle It is the crust The very upper part of the mantle is solid rock It does not include the sky http://www.bing.com/images

7. Asthenosphere The layer in Earth’s upper mantle directly under the lithosphere It lies below the lithosphere It has a relatively low density Seismic waves pass slowly through this layer http://www.bing.com/images

8. Tectonic Plate :{) One of the large, moving pieces into which Earth’s lithosphere is broken and which commonly carry both oceanic and continental crust There are 10 different plates They are part of the lithosphere They are on top of the athenosphere http://www.bing.com/images

9. Continental Drift The hypothesis that Earth’s continents move on Earths’ surface It was first put out by Abraham Ortelius It was first introduced in 1596 Plate tectonics helped the theory of the continental drift. http://www.bing.com/images

10. Pangaea A hypothetical supercontinent that once included all of the landmasses on Earth The name comes from Ancient Greek They say it formed 300 million years ago They say it began to break up about 200 million years ago http://www.bing.com/images/

11. Convection Current A circulation pattern in which material is heated and rises in one area, then cools and sinks in another area Convection is caused by them. They circle throughout Earth’s layers They are very important http://www.bing.com/images

12. Divergent Boundary A boundary along which two tectonic plates move apart It is related to plate tectonics It is part of the process of two plates moving apart It occurs in the lithosphere http://www.bing.com/images

13. Convergent Boundary A boundary along which two tectonic plates push together In plate tectonics, a convergent boundary, also known as a destructive plate boundary (because of subduction), is an actively deforming region where two (or more) tectonic plates or fragments of lithosphere move toward one another and collide. As a result of pressure, friction, and plate material melting in the mantle, earthquakes and volcanoes are common near convergent boundariesplate tectonicssubductionlithosphere mantlevolcanoes http://www.bing.com/images

14. Transform Boundary A boundary along which two tectonic plates scrape past each other A transform fault or transform boundary, also known as conservative plate boundary since these faults neither create nor destroy lithosphere, is a type of fault whose relative motion is predominantly horizontal in either sinistral or dextral directionlithospherefaultmotionhorizontalsinistraldextral http://www.bing.com/images

15. Magnetic Reversal A switch in the direction of Earth’s magnetic field so that the magnetic north pole becomes the magnetic south pole A geomagnetic reversal is a change in the Earth's magnetic field such that the positions of magnetic north and magnetic south are interchanged.Earth's magnetic field http://www.bing.com

16. Hot Spot An area where a column of hot material rises from deep within a planet’s mantle

17. Subduction The process by which an oceanic tectonic plate sinks under another plate In geology, subduction is the process that takes place at convergent boundaries by which one tectonic plate moves under another tectonic plate, sinking into the Earth's mantle, as the plates converge. These 3D regions of mantle downwellings are known as "Subduction Zonesgeologyconvergent boundariestectonic plateEarth's mantle http://www.bing.com/images

18. Source For Facts http://en.wikipedia.org/wiki