Plate Tectonics
By: Davon and Whitney
Vocabulary
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Crust
Mantle
Core
Lithosphere
Asthenosphere
Mesosphere
Outer core
Inner core
Tectonic plate
Continental drift
Sea-floor spreading
Convergent boundary
Subuction zone
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Divergent boundary
Transform boundary
Stress
Compression
Tension
Folding
Fault
Normal fault
Reverse fault
Strike-slip fault
Vocabulary
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Sea-floor spreading •
Convergent boundary •
Seduction zone
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Divergent boundary •
Transform boundary •
Stress
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Compression
Tension
Folding
Fault
Normal fault
Reverse fault
Strike-slip fault
Tectonic Plate Boundaries
Sea floor
Sea-floor spreading creates new oceanic lithosphere at midocean ridges.
Pangaea
Structure of the earth
Vocabulary Review
• Asthenosphere- the soft layer of the mantle
on which pieces of the lithosphere move
• Plate tectonics- the theory that the earths
lithosphere is divided into tectonic plates that
move around on top of the asthensphee
• Folding-the bending of rock layers due to
stress in the earths crust
• Convergent boundary-the boundary between
two colliding tectonic plates
Vocabulary Review
• Sea-floor spreading- the process by which new
oceanic lithosphere is created at mid-ocean
ridges as older materials are pulled away from
the ridge.
• Crust- the thin, outermost layer of the earth, or
the uppermost part of the lithosphere.
• Seduction zone-the region where an oceanic
plate sinks down into the asthenosphere at a
convergent boundary, usually between
continental and oceanic plate
Vocabulary Review
• Stress- the amount of force per unit area that
is put on a given material.
• Tension- the type of stress that occurs when
forces act to stretch an object.
• Reverse fault- a fault in which the hanging wall
moves up relative to the footwall.