Transcript INTERNAL FORCES PHOTOS - Vernon Hills High School

INTERNAL FORCES OF THE EARTH
4 layers of earth
 1-crust
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Where people live; continents stuck into crust
2-mantle

“hot liquid rock-magma”; like hot caramel
3-outer core
 4-inner core
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PLATE TECTONICS
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Crust is divided into stiff, moving plates
RING OF FIRE
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AREA IN PACIFIC WHERE PLATE IS
THINNER
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MORE EARTHQUAKES & VOLCANOES
VOLCANOEHTTP://WWW.VOLCANO.SI.EDU/WORLD/REGION.CFM?RNUM=13S BY REGION
3-MIDDLE OF PLATE
LESS INTERNAL FORCES—HEAT &
PRESSURE
 MORE EXTERNAL FORCES-WIND & WATER
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EXAMPLE OF SPREADING--
Plate A
Plate B
Mid
Oceanic
Ridge
“underwate
Volcano”
Sea floor
spreads
PLATE MOVEMENT
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FOLDING
PLATES COLLIDING 2
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FAULT- PLATE CRACKS & MOVES
TRENCH CREATION—SUBDUCTION
SMALLER PLATE GOES UP/BIG PLATE GOES DOWN
TRANSFORM—PLATES SLIDE PAST
EARTHQUAKE ZONES
PLATES SLIDE PAST EACH OTHER
RESULTS OF INTERNAL FORCES
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Types of landforms created
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What do they look like?
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Mountains, valleys, volcanoes, islands
Higher, jagged, steep slopes
Primary landforms
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Created by heat & pressure, plate movement
EXTERNAL FORCES
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Rock weathering
Water
 -breaks rock down
 Transports rock
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WIND
Transports rocks & minerals
 Breaks down rocks (2 rocks run into each other0
 Creates sand dunes
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GLACIERS
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Heavy ice
Flattens land
 Picks up sediment
 Leaves some parts behind as it moves
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Creates:
Plains
 Fertile land
 Carves out rivers
 Leaves ice that will melt to become lakes
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RESULTS OF EXTERNAL FORCES
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TYPES OF LANDFORMS
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LOOK LIKE?
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Plains, plateaus, alluvial fans, deltas,
Lower in elevation, rounded, smaller
SECONDARY
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Created by external forces like wind, water, glaciers
CONTINENTAL DRIFT THEORY
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PANGAEA
Evidence #1
-Jigsaw
Puzzle
All continents
Seem to fit
together
EVIDENCE
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2-fossil remains
EVIDENCE #3-SEA FLOOR SPREADING
HTTP://WWW.TECTONICS.CALTECH.EDU/OUTREA
CH/ANIMATIONS/DRIFT.HTML
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Sea floor spreading