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T YPES OF P LATE MOVEMENT If plates can move apart, what other types of movement are possible?

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Presentation on theme: "T YPES OF P LATE MOVEMENT If plates can move apart, what other types of movement are possible?"— Presentation transcript:

1 T YPES OF P LATE MOVEMENT If plates can move apart, what other types of movement are possible?

2 Moving toward each other; Moving underneath another; Moving up or down relative to the other.

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4 A DD TO YOUR VOCAB SHEET : PageWordDefinitionSketch/Example DivergencePlates moving away from each other. South America is moving away from Africa ConvergencePlates moving toward each other. Juan de Fuca Plate is moving below North American Plate TransformPlates moving north or south relative to each other. The Pacific Plate is moving north relative to the North American Plate.

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6 W HAT EFFECTS CAN P LATE T ECTONICS HAVE ON G EOGRAPHY ? Build volcanoes when one plate “subducts” under another:

7 T HAT ’ S HOW WE GOT OUR COASTAL VOLCANOES, ( NOW MOUNTAINS ):

8 O UR VOLCANOES ARE NOW DORMANT, SO WE CONSIDER THEM JUST “ MOUNTAINS.” Eg: Garibaldi, Mount Baker, Mount Saint Helen’s.

9 “S UBDUCTION :” “S UB ” AS IN “ BELOW ”

10 W HEN PLATES COME TOGETHER, BUT T HEY ’ RE OF SIMILAR THICKNESS AND WEIGHT, ONE DOESN ’ T SINK BELOW THE OTHER. I NSTEAD … The continental crusts push upward, forming… Mountains.

11 I NDIA WASN ’ T ALWAYS ATTACHED TO E URASIA

12 M OUNT E VEREST, THE TALLEST MOUNTAIN IN THE WORLD, IS THE RESULT : 8,848 M

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14 W HAT HAPPENS AT TRANSFORM BOUNDARIES ? Tension builds, then every once in a while, there is … An earthquake

15 You can see the San Andreas Fault from the air:

16 N OTE THE LATERAL MOVEMENT OF ONE SIDE OF THE FIELD COMPARED TO THE OTHER :

17 A DD THE R ED WORDS TO YOUR VOCAB SHEET : PageWordDefinitionSketch/Example DivergencePlates moving away from each other. Causes “new land.” South America is moving away from Africa ConvergencePlates moving toward each other. Causes volcanoes when subducting; causes mountains when both plates rise together. Juan de Fuca Plate is moving below North American Plate TransformPlates moving north or south relative to each other. Causes earthquakes The Pacific Plate is moving north relative to the North American Plate.

18 Y OUTUBE :T HE E ARTH 650,000,000 YEARS AGO TO 250,000,000+ YEARS AGO.

19 F REE A PP TO OBSERVE PLATE TECTONICS FORWARDS AND BACKWARDS AT YOUR OWN PACE : E ARTHVIEWER This website allows you to drag continents around, (need “Shockwave installed.) http://www.pbs.org/wgbh/aso/tryit/tectonics/#


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