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Plate Movement and Plate Boundaries Chapter 4, Section 3
Plate Tectonics Theory Lithosphere is divided into plates Plates move around on the asthenosphere
3 Causes of plate motion
Slab Pull Oceanic plate sinks (more dense) Pulls rest of tectonic plate with it
Ridge Push Oceanic crust is higher at ridge Pushes plate underneath continent
Convection Happens in asthenosphere Hot magma rises, cool magma sinks Drags plates sideways
3 Types of Plate Boundaries Convergent Divergent Transform Fault
Continent / Continent Plates thicken and buckle Push upwards Mountain formation
Continent / Oceanic Oceanic plate sinks (more dense) Subduction zone Trenches form Volcanic mtns on coast
Oceanic / Oceanic One slides under the other Subduction zones Volcanic Islands
Divergent Boundary Plates spread apart Magma rises New lithosphere formed Mid – Atlantic Ridge
Transform Boundary Plates slide past each other Produce earthquakes
Types of Plate Boundaries: DivergentConvergentTransform
Continent / Continent Examples Appalachian Mtns. Atlas Mtns.
Continent / Oceanic Examples Andes Cascades Mt. St. Helens
Oceanic / Oceanic Examples Aleutians Japan Philippines
Plate Movement Approx. 3-6 cm per year Rate a fingernail grows!
Flash card review Flash card review
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Choose a category. You will be given the answer. You must give the correct question. Click to begin.
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Imagine the Earth as a hardboiled egg……………………. The thin brittle shell is the crust that humans live on. The thick jelly like white is the deep hot magma.
Some questions we will answer today: –How is the earth always changing? –What forces inside the earth create and change landforms on the surface? –What.
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Mr. Russo Beaumont High School Divergent boundary Convergent boundary Transform fault boundary Oceanic Ridge Rift Valley Seafloor Spreading.
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