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Earth’s Moving Boundaries: shaping the planet the.

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Presentation on theme: "Earth’s Moving Boundaries: shaping the planet the."— Presentation transcript:

1 Earth’s Moving Boundaries: shaping the planet the

2 Earth’s Moving Plates Lithosphere  the solid part of the Earth Lithosphere  the solid part of the Earth Tectonic plates  large chunks of rock that float on the mantle Tectonic plates  large chunks of rock that float on the mantle

3 Earth’s Moving Plates Transform Fault  cracks along ocean ridge that allow the crust to slide Transform Fault  cracks along ocean ridge that allow the crust to slide

4 Content Check-Up 1)Tectonic plates are _____. A.Large chunks of rocks that float on the mantle B.Large chunks of rocks that are in the mantle C.Sheets of magma in the core D.Part of the outer core

5 Content Check-Up 2)The lithosphere is _____. A.The liquid part of the Earth. B.The Gaseous part of the Earth. C.The solid part of the Earth. D.The spherical part of the Earth.

6 Earth’s Moving Plates 3)Which is directly on a plate boundary?

7 Plate Boundaries Divergent boundary  two plates move apart creating crust Divergent boundary  two plates move apart creating crust

8 Plate Boundaries Divergent boundary  two plates move apart creating crust Divergent boundary  two plates move apart creating crust Surtsey, Iceland  the newest place on earth

9 Plate Boundaries Divergent boundary  two plates move apart creating crust Divergent boundary  two plates move apart creating crust Surtsey, Iceland  the newest place on earth

10 Content Check-Up 4)The type of boundary that created Iceland and the new ocean floor: A.Divergent B.Convergent C.Collisional D.Transform

11 Plate Boundaries Divergent boundary  two plates move apart creating crust Divergent boundary  two plates move apart creating crust Also called constructive boundaries Thingvellir, Iceland, showing a fissure zone (in shadow )

12 Plate Boundaries Divergent boundary  two plates move apart Divergent boundary  two plates move apart Also called constructive boundaries mid-ocean ridge

13 Magnetic Striping The magnetic stripes are proof of ocean-floor spreading and that the Earth’s poles have switched many times. The magnetic stripes are proof of ocean-floor spreading and that the Earth’s poles have switched many times.

14 Magnetic Striping The magnetic stripes are proof of ocean-floor spreading and that the Earth’s poles have switched many times. The magnetic stripes are proof of ocean-floor spreading and that the Earth’s poles have switched many times.

15 Ocean-Floor Spreading Can you guess where the sea floor is starting to spread? Can you guess where the sea floor is starting to spread?

16 Ocean-Floor Spreading Now, can you guess where the sea floor is starting to spread? Now, can you guess where the sea floor is starting to spread?

17 Ocean-Floor Spreading Can you guess now? Can you guess now? Several small plates meet in the north- western Africa Several small plates meet in the north- western Africa Tension is causing the plates to pull apart Tension is causing the plates to pull apart

18 The Breakup of Pangaea

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24 Ocean-Floor Spreading

25 Where Are We Going? Where Are We Going?

26 Plate Boundaries

27 Content Check-Up 4)What do the stripes on the ocean floor prove? A.That there are different currents in the ocean. B.That the sea floor is spreading evenly on both sides. C.That magnets exist. D.That there are many rocks in the ocean.

28 Content Check-Up 5)What created the stripes on the ocean floor? A.Ocean Currents B.Mantle Currents C.Reversing magnetic poles of the Earth with moving tectonic plates. D.Moving tectonic plates

29 Plate Boundaries convergent boundary  two plates move together destroying crust convergent boundary  two plates move together destroying crust Ocean crust vs. continental crust

30 Plate Boundaries convergent boundary  two plates move together destroying crust convergent boundary  two plates move together destroying crust Ocean crust vs. continental crust Patagonia, Chile (not just a line of fleece for soccer mom’s)

31 Plate Boundaries convergent boundary  two plates move together destroying crust convergent boundary  two plates move together destroying crust Ocean crust vs. continental crust Pachapaqui mining area in Peru

32 Content Check-Up 6)Which of the following will not be found at a convergent boundary? A.Earthquakes B.Volcanoes C.Trenches D.A subducting plate E.A mid-ocean ridge

33 Content Check-Up 7)Which is the best explanation for the existence of volcanoes in Washington state? A.It is a divergent boundary. B.It is a collisional boundary. C.A plate is subducting under the North American Plate. D.It is a transform boundary.

34 Earth’s Moving Plates The Juan de Fuca Plate is Subducte d below the North Anerican Plate The Juan de Fuca Plate is Subducte d below the North Anerican Plate

35 Plate Boundaries convergent boundary  two plates move together destroying crust convergent boundary  two plates move together destroying crust Ocean crust vs. ocean crust

36 Plate Boundaries convergent boundary  two plates move together destroying crust convergent boundary  two plates move together destroying crust Ocean crust vs. ocean crust Aleutian Is., Alaska

37 Plate Boundaries convergent boundary  two plates move together destroying crust convergent boundary  two plates move together destroying crust Ocean crust vs. ocean crust Is this a convergent boundary?

38 Content Check-Up 8)The Aleutian Islands of Alaska were formed by a A.divergent boundary. B.collisional boundary. C.transform boundary. D.convergent boundary

39 Content Check-Up 9) The Marianas Trench is formed by a A.divergent boundary. B.collisional boundary. C.plate is subducting under the North American Plate. D.transform boundary. E.convergent boundary

40 Plate Boundaries convergent boundary  two plates move together destroying crust convergent boundary  two plates move together destroying crust Continental crust vs. continental crust (aka: collisional boundary)

41 Plate Boundaries convergent boundary  two plates move together destroying crust convergent boundary  two plates move together destroying crust Continental crust vs. continental crust (aka: collisional boundary) Mt. Everest, Nepal

42 Content Check-Up 10)The collisional boundary that formed Mount Everest is most closely related to a ____. A.divergent boundary. B.transform boundary C.convergent boundary

43 Plate Boundaries Collisional boundary  two plates move together destroying crust Collisional boundary  two plates move together destroying crust Continental crust vs. continental crust (aka: collisional boundary) Mt. Everest, Nepal

44 Plate Boundaries Strike-slip boundary  rocks slide past each other no rock destroyed nor created Strike-slip boundary  rocks slide past each other no rock destroyed nor created San Andreas Fault, California

45 Content Check-Up 11) Which of the following are found a transform boundaries? A.Volcanoes B.Earthquakes C.Trenches D.Subduction

46 Plate Boundaries

47 12)Which is the mantle?

48 13)Which is the lithosphere?

49 14)Which is a mid ocean ridge?

50 15)Which is a convergent boundary?

51 16)Which is a divergent boundary?

52 17)Which is a trench?

53 18)Where are the convection currents found?

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55 Oceanic Crust Continental Crust Add the Geological Features that will Occur

56 Life on the Ocean Floor Alvinellid worms most heat- tolerant animals on the planet Alvinellid worms most heat- tolerant animals on the planet build their papery tubes right beside 350 C

57 Life on the Ocean Floor Alvinellid worms most heat- tolerant animals on the planet Alvinellid worms most heat- tolerant animals on the planet build their papery tubes right beside 350 C green bacteria attached to the worm's back. make enzymes that may hold the key to new protein based catalysts for making drugs, paper, food and a host of other goods.

58 Life on the Ocean Floor Tube worms  The red plume absorbs sulfurous water that a sac of bacteria inside the worm uses to generate energy and food for the worm. Tube worms  The red plume absorbs sulfurous water that a sac of bacteria inside the worm uses to generate energy and food for the worm.

59 Life on the Ocean Floor Mussels  accidentally gold, owing to the make-up of their shells Mussels  accidentally gold, owing to the make-up of their shells nutritional boost from bacteria but can also filter food directly from the water. anchor themselves, with elastic lines that stick everything

60 Life on the Ocean Floor Amphipods  These look like shrunken shrimp Amphipods  These look like shrunken shrimp just fractions of an inch long travel in swarms and eat tiny animals and detritus they feed fish and other larger animals.

61 Life on the Ocean Floor Zoarcid fish  vent fish are of the long-and-flat variety, with a long fin running the length of the spine Zoarcid fish  vent fish are of the long-and-flat variety, with a long fin running the length of the spine probably rely heavily on amphipods for food

62 Life on the Ocean Floor Zoarcid fish  vent fish are of the long-and-flat variety, with a long fin running the length of the spine Zoarcid fish  vent fish are of the long-and-flat variety, with a long fin running the length of the spine probably rely heavily on amphipods for food

63 Life on the Ocean Floor Galatheid crabs  litter the bottom, standing motionless on the dark rock Galatheid crabs  litter the bottom, standing motionless on the dark rock

64 Life on the Ocean Floor Clams  8 inches, and they're late arrivals to the study site Clams  8 inches, and they're late arrivals to the study site With no mud to burrow into, they anchor themselves by sticking their fleshy foot down into cracks in the cold lava.


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