Plates can move apart Plates in the middle ocean often move apartDIVERGE Plates in the middle ocean often move apartDIVERGE The middle of our ocean has the thinnest crust and THATS mostly where NEW Earth comes from ID: 534227
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COMPARE & CONTRAST THE EARTH’S LITHOSPHERE with ASTHENOSPHERE1. EXPLAIN HOW CONVECTION WORKSWhere does TEMPERATURE in the EARTH come from?What does DENSITY have to do with EARTH’s inner LAYERS and what are they MADE of?LIST & DESCRIBE FIVE (5) PIECES of EVIDENCE that SUPPORT the theory of CONTINENTAL DRIFT. EXPLAIN WEGENER’s EVIDENCE for HIS theory of CONTINENTAL DRIFT! Explain his theory!!!
Draw Earth’s layers (crust, mantle, cores)
DRAW
WEGENER
Draw the most recent one hereSlide2
Part 2Slide3
NEW Continental Drift EVIDENCE:1. MAGNETIC REVERSAL in our mid- ocean ridges.2. NEWSlide4
NEW Continental Drift EVIDENCE:1. MAGNETIC REVERSAL in our mid- ocean ridges.2. Careful MAPPING & TRACKING the movement of Earth’s PLATES. NEWSlide5
Geologists have mapped all of the Earth’s plates.Slide6
Scientists track the movement of our Earth’s plates…over landground truthingSlide7
Scientists track the movement of our Earth’s plates…under seaSlide8
Subs use SONAR…Sonar --(sound echo-location) tomap the ocean floor.Slide9
Subs use SONAR…Sonar --(sound echo-location) tomap the ocean floor.NOW THERE ARE ROVsSlide10Slide11
Subs use SONAR…Sonar --(sound echo-location) tomap the ocean floor.Slide12Slide13Slide14
NEW Continental Drift EVIDENCE:1. MAGNETIC REVERSAL in our mid- ocean ridges.2. Careful MAPPING & TRACKING the of Earth’s PLATES. SONAR…undersea NEWSlide15
Geologists study ROCK core samplesto show howand when our rocky lands were once connected.Slide16
NEW Continental Drift EVIDENCE:1. MAGNETIC REVERSAL in our mid- ocean ridges.2. Careful MAPPING & TRACKING the movement of Earth’s PLATES. SONAR…undersea ROCK CORE samples NEWSlide17
What else do we have today that keeps track of our moving plates?Slide18
A computer-made image of objects in Earth orbit currently being tracked. About 95% of the objects in this illustration are orbital debris, not functional satellites. The dots represent the current location of each item, but are not scaled to Earth. The image provides a good idea of where the greatest orbital debris is.Slide19
A computer-made image of objects in Earth orbit currently being tracked. About 95% of the objects in this illustration are orbital debris, not functional satellites. The dots represent the current location of each item, but are not scaled to Earth. The image provides a good idea of where the greatest orbital debris is.Slide20
NEW Continental Drift EVIDENCE:1. MAGNETIC REVERSAL in our mid- ocean ridges.2. Careful MAPPING & TRACKING the of Earth’s PLATES. SONAR…undersea ROCK CORE samples GPS satellites NEWSlide21Slide22
Because of Wegener and all the more advanced tech, we have a keen awareness of how our plates move.Slide23
And from this info, we have developed another Theory.It describes what happens to Earth when these plates move…Slide24
the THEORY of PLATE TECTONICSSlide25
What are the FOUR (4) WAYS our Earth’s PLATES MOVE?Slide26
Plates can move apart…Slide27
Plates in the middle ocean often move apart…DIVERGESlide28
Plates in the middle ocean often move apart…DIVERGESlide29
The middle of our ocean has the thinnest crust and THAT’S mostly where NEW Earth comes from!Slide30
Hydrothermal vents build up new crust that slowly move away from each otherSlide31
PLATES move 4 ways!DIVERGING PLATESSlide32
PLATES move 4 ways!DIVERGING PLATESMOVE AWAY form NEW CRUST usually from THIN MID-OCEAN (RIDGE).Slide33
PLATES move 4 ways!DIVERGING PLATESMOVE AWAY form NEW CRUST usually from THIN MID-OCEAN (RIDGE).CONVERGING PLATES 1Slide34
PLATES move 4 ways!DIVERGING PLATESMOVE AWAY form NEW CRUST usually from THIN MID-OCEAN (RIDGE).CONVERGING PLATES 1CONVERGING PLATES
2Slide35
Plates can collide together 2 ways!Slide36
DIVERGING PLATESPLATES that MOVE AWAY form NEW CRUST usually from THIN MIDDLE OCEAN RIDGES.MAGNETIC REVERSALS!CONVERGING PLATES
1CONTINENTAL vs. CONTINENTAL CRUST
CONVERGING PLATES
2
OCEAN vs. CONTINENTAL CRUSTSlide37
When THICK CONTINENTAL crust CONVERGES with another THICK CONTINENTAL crust…Continental-continental collision=mountainsSlide38
PLATES move 4 ways!DIVERGING PLATESPLATES that MOVE AWAY form NEW CRUST usually FROM THE MIDDLE OCEAN RIDGES.MAGNETIC REVERSALS!CONVERGING PLATESCONTINENTAL to CONTINENTALCRUSTS:MOUNTAINS!!!!!!!Slide39
PLATES MOVE 4 WAYS:DIVERGING PLATESPLATES that MOVE AWAY form NEW CRUST usually
from THIN MIDDLE
OCEAN RIDGES
.
MAGNETIC REVERSALS!CONVERGING PLATES
1
CONTINENTAL vs. CONTINENTAL
CRUST…
MOUNTAINS
form.
CONVERGING PLATES
2
OCEAN
vs. CONTINENTAL CRUSTSlide40
OCEAN & CONTINENTAL PLATES COLLIDESlide41
PLATES MOVE 4 WAYS:DIVERGING PLATESPLATES that MOVE AWAY form NEW CRUST usually
from THIN MIDDLE
OCEAN RIDGES
.
MAGNETIC REVERSALS!CONVERGING
PLATES
1
CONTINENTAL vs. CONTINENTAL
CRUST…
MOUNTAINS
form.
CONVERGING PLATES
2
OCEAN
vs. CONTINENTAL CRUSTSlide42
OCEAN & CONTINENTAL PLATES COLLIDEThe thin ocean plate gets pushed down by the thicker continental crust. A deep ocean trench forms as ocean crust is pushed down into the melt.Slide43
The thin ocean plate gets pushed down by the thicker continental crust. A deep ocean trench forms as ocean crust is pushed down into the melt. SUBductionSlide44
PLATES move 4 ways…DIVERGING PLATESPLATES that MOVE AWAY form NEW CRUST usually FROM THE MIDDLE OCEAN RIDGES.MAGNETIC REVERSALS!
CONVERGING PLATES 1
CONTINENTAL to CONTINENTAL(land to land)CRUSTS COLLIDE:
MOUNTAINS!!!!!!!CONVERGING PLATES 2
OCEAN into CONTINENTAL CRUSTS—SUBDUCTION (ocean crust melts below the thicker continental crust…OLD TRENCHES
VOLCANOES!
Slide45
What happens with SUBDUCTION?Slide46
What happens with SUBDUCTION? TRENCHESSlide47
PLATES move 4 ways…DIVERGING PLATESPLATES that MOVE AWAY form NEW CRUST usually FROM THE MIDDLE OCEAN RIDGES.MAGNETIC REVERSALS!CONVERGING PLATES 1CONTINENTAL to CONTINENTAL(land to land)CRUSTS COLLIDE:
MOUNTAINS!!!!!!!
CONVERGING PLATES 2OCEAN into CONTINENTAL
CRUSTS—SUBDUCTION (ocean crust melts below the thicker continental crust…
OLD TRENCHESVOLCANOES! Slide48
The “ring of fire” is the Pacific Ocean plate pushing under other continental crustsJUST LOOK AT ALL THE DOTS!Slide49
Warm Up September 11th, 2014 Eyjafjallajökull Slide50
Warm Up Friday the 13th, 2013Slide51
Warm Up Friday the 13th, 2013Slide52
Warm Up Friday the 13th, 2013Slide53
Warm Up Friday the 13th, 2013Slide54
What happens with SUBDUCTION?Slide55
subducting plates volcanoesSlide56
The thin ocean plate gets pushed down by the thicker continental crust. A deep ocean trench forms as ocean crust is pushed down into the melt.Slide57
volcanic stuff cool …1st 2:00https://www.youtube.com/watch?v=e4PUOBIwEv0Slide58
PLATES move 4 ways…DIVERGING PLATESPLATES that MOVE AWAY form NEW CRUST usually FROM THE MIDDLE OCEAN RIDGES.MAGNETIC REVERSALS!CONVERGING
PLATES 1CONTINENTAL to CONTINENTAL(land to land)CRUSTS COLLIDE:
MOUNTAINS!!!!!!!
TRANSFORM plates
CONVERGING PLATES 2OCEAN into CONTINENTAL CRUSTS—SUBDUCTION (ocean crust melts below the thicker continental crust…
OLD TRENCHES
VOLCANOES!
Slide59
Earth’s plates are moving…Slide60
PLATES move 4 ways…DIVERGING PLATESPLATES that MOVE AWAY form NEW CRUST usually FROM THE MIDDLE OCEAN RIDGES.MAGNETIC REVERSALS!CONVERGING
PLATES 1CONTINENTAL to CONTINENTAL(land to land)CRUSTS COLLIDE:
MOUNTAINS!!!!!!!
TRANSFORM plates
SCRAPE PAST each otherCONVERGING PLATES 2OCEAN into CONTINENTAL
CRUSTS—
SUBDUCTION (ocean crust melts below the thicker continental crust…
OLD TRENCHES
VOLCANOES!
Slide61
Earth’s plates are transforming…Slide62
PLATES move 4 ways!DIVERGING PLATESPLATES that MOVE AWAY form NEW CRUST usually FROM THE MIDDLE OCEAN RIDGES.MAGNETIC REVERSALS!
CONVERGING PLATES 1
CONTINENTAL to CONTINENTAL(land to land)CRUSTS COLLIDE:
MOUNTAINS!!!!!!!TRANSFORM platesSCRAPE PAST each other
CONVERGING PLATES 2OCEAN into CONTINENTAL CRUSTS—SUBDUCTION (ocean crust melts below the thicker continental crust…
OLD TRENCHES
VOLCANOES!
Slide63
PLATES move 4 ways…DIVERGING PLATESPLATES that MOVE AWAY form NEW CRUST usually FROM THE MIDDLE OCEAN RIDGES.MAGNETIC REVERSALS!CONVERGING
PLATES 1CONTINENTAL to CONTINENTAL(land to land)CRUSTS COLLIDE:
MOUNTAINS!!!!!!!
TRANSFORM plates
SCRAPE PAST each other
EARTHQUAKES!
CONVERGING
PLATES
2
OCEAN into CONTINENTAL
CRUSTS—
SUBDUCTION
(ocean crust melts below the thicker continental crust…
OLD TRENCHES
VOLCANOES!
Slide64
Using GPS & groud truthing(surveying) we can track which directions our tectonic plates are going.Slide65
Do you see diverging plates?Slide66
When plates are moving away from each other, they are divergent plates.Slide67
DIVERGENT plates are _____________ as thin mid-ocean crust (mid-ocean ridges) pull apart from convecting magma below!Slide68
DIVERGENT plates are undersea as thin mid-ocean crust (mid-ocean ridges) pull apart from convecting magma below!new crust forms hereSlide69
Any converging plates?Slide70
Japan is here… major mountains, volcanoes and earthquakes here.Slide71
How many transform plates do you see?Slide72
When plates rub past each other, they are transform plates.Slide73
What kind of plate movement formed this?Slide74
What kind of plate movement formed this?Subducting (continentalover oceanic) plates!Slide75
Sometimes a tectonic plate is too big heat evenly. So big plates have hot spots to keep the entire plate hot. Slide76
Sometimes a tectonic plate is too big heat evenly. So big plates have hot spots to keep the entire plate hot. HawaiiSlide77
Sometimes a tectonic plate is too big heat evenly. So big plates have hot spots .. HawaiiSlide78
What plate movement made this happen?Slide79
What plate movement made this happen?TRANSFORM PLATE BOUNDARIES!Slide80
More transforming plate disasters.Slide81
When plates move, tsunamis happen.What kind of RARE plate movement is this?Slide82
When plates move, tsunamis happen.What kind of RARE plate movement is this? Ocean to Ocean plate converging!Slide83
Spray at the horizon and retreated water indicate a forthcoming Tsunami. This photograph shows the 2004 Tsunami in Thailand. Instead of seeking shelter, the people are amazed about the coming waves.Spray at the horizon and retreated water indicate a forthcoming Tsunami. This photograph shows the 2004 Tsunami in Thailand. Instead of seeking shelter, the people are amazed about the coming waves. Slide84
The people have realised that something is wrong. But it is too late now.Slide85
What plate movement causes tsunamis?Is it ocean to continent subduction?Is it continent into continent converging?Is it ocean into ocean subduction?Is it 2 ocean crusts diverging?Slide86
What plate movement causes tsunamis?Is it ocean to continent subduction?Is it continent into continent converging?Is it ocean into ocean subduction?Is it 2 ocean crusts diverging?Slide87Slide88
What plate movement causes tsunamis?usually ocean into ocean plate subduction!Slide89
END!!!!Slide90
Altogether, geologists, archaeologists and paleontologists have been able to retrace how our continents slowly developed and drifted all over our planet.http://www.youtube.com/watch?v=IbcVM3MdiWw&feature=relatedBEST with the future:http://www.youtube.com/watch?feature=fvwp&NR=1&v=uGcDed4xVD4http://www.youtube.com/watch?v=GNmUd43pabg&feature=relatedConnected with life form evolution for later.