PLATE TECTONICS

PLATE TECTONICS

• Pieces of the lithosphere that are in slow constatnt movement

CAUSE 1: CONVECTION CURRENTS

• The flow that transfers heat through a fluid

CAUSE 2: SLAB PULL

• The pulling of a slab or plate caused by gravitational pull
• This occurs during subduction

CAUSE 3: RIDGE PUSH

• New crust pushes older denser crust at divergent boundary

DIVERGENT

• When two plates slide or move away from each other

RESULT OF DIVERGENT BOUNDARY ON LAND

• A Rift Valley is the result of a divergent boundary on land
• Landform that results from a divergent plate boundary

RESULT OF DIVERGENT BOUNDARY UNDERWATER

• A mid-ocean ridge results from divergent boundaries underwater
• Underwater landform that is caused by a divergent plate boundary

CONVERGENT

• When two tectonics plates crash together

OCEAN VS CONTINENTAL

• A trench with volcanic arc will form here
• Mariana Trench

OCEAN VS OCEAN

• A trench with an island arc will form here
• Japan Trench

CONTINENTAL VS CONTINENTAL

• A mountain range will form here
• Appalacian Mountains

SUBDUCTION ZONE

• The area where two plates meet and one sinks beneath the other

DEEP OCEAN TRENCH

• A long, narrow, steep-sided in the oceanic crust
• Japan Trench

TRANSFORM BOUNDARY

• When two plates slide past each other
• Earthquakes occur from transform boundaries
• San Andreas Fault