PLATE TECTONICS

1. PLATE TECTONICS

2. History of Pangaea • Alfred Wegner originated the theory of Pangaea. • The Theory of a Super Continent was not originally accepted by scientists. After a while they rethought the idea and believed it. • Pangaea-The ancient super continent, comprising all the continents. • Pangaea is a hypothetical ancient super continent incorporating all the earths major land masses. Jurassic period or millions of years.

3. History of Pangaea 2 • The theory that was being discussed during the time Wegner introduced his Pangaea theory was that the continents never move but land bridges formed and disappeared through out time. • Alfred Wegner- 1880–1930, German meteorologist and geophysicist: originated theory of continental drift. • Harry Hess and R. Dietz, later assisted in the recognition of Wegners theory. These people ideas relate to Wegners original findings because they all proved that convection is under the earths surface. • Alfred Wegner was a German geologist and a meteorologist.I think it relates because geologist study rocks and minerals. So if a meteor comes down he can observe the meteor.

4. Convergent Boundaries • A convergent boundary is when 2 continents are moving opposite directions and collide and one of the 2 continents is forced under the other. • Convergent boundary- a major geologic discontinuity or suture marking the juncture of lithospheric plates that have been joined by plate tectonics. • Earthquakes, volcanoes, mountains, landslide, trenches, and mudslides are all hazards of a convergent boundary. • Trench- a long, steep-sided, narrow depression in the ocean floor. • Aleutian trench is where the pacific plate is being sub ducted under the north American plate. • Moutain- a natural elevation of the earth's surface rising more or less abruptly to a summit, and attaining an altitude greater than that of a hill, usually greater than 2000 ft.

5. Divergent Boundaries • In my own words a divergent boundary is where a boundary and 2 different unions of countries are. • Divergent boundary- is a linear feature that exists between two tectonic plates that are moving away from each other. • An example of a divergent boundary is the mid Atlantic bridge its on the north American and Eurasian plate. • Volcano- a vent in the earth's crust through which lava, steam, ashes, etc., are expelled, either continuously or at irregular intervals. • Tsunami, Mountains, and volcanoes are all hazards of a divergent Boundary.

6. Transform boundaries • In my own words a transform Boundary is when disaster oceans split of small bits of land. • Earthquake is a hazard of a Transform Boundary. • Transform boundary- Transform boundaries occur when two plates are sliding along each other in opposing directions. Due to friction when the plates buckle and shift, they often cause earthquakes. • An example of Transform Boundary is San Andres which is on the north American and Pacific plate. • Earthquake- a series of vibrations induced in the earth's crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating.

7. Real world connections • We live on the north American plate. • Canada and south America border the united states. • We are not in any danger of hazards to plate tectonics. Except people that live on the coast of the united states. • Boundary- something that indicates bounds or limits; a limiting or bounding line. • I anticipate In the future that there will be less problems since the plates will be together so it will be easier to travel and trade.

8. Extra notes!!! • Plates are made up of rocks and drift all over the globe • Landslide- the downward falling or sliding of a mass of soil, detritus, or rock on or from a steep slope. • The plates change in size and margins • The plates are about 50 to 250 miles thick • Mudslide- the rapid downward movement of a large quantity of saturated earth. • The map of the earth is always changing • Plate-the continents on the surface.

9. cites • Bing.com • Wikipedia.com