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24 Cards in this Set

  • Front
  • Back
Continental drift
The theory that the continents can move apart from each other and have done so in the past
Tectonics
The study of the movement and changes in the rocks that make up the Earth's crust
Convection current
The flow of hot fluin in a circular pattern
Plate boundary
The point at which one tectionic plate touches another
Convergent boundary
The boundary between two plates that are moving together
Subduction
The process of one tectionic plate is pushed under another tectonic plate
Trench
A deep underwater valley
Divergent boundary
The boundary between two tectonic plates that are moving away from each other
Midocean ridges
The mountain chains that from on the ocean floor where tectonic plates pull apart
Sea-floor spreading
The process by which new oceanic lithosphere is formed at a midocean ridges a older materials are pulled away from the ridge
Transform boundary
The boundary between two tectonic plates that are sliding past each other horizontally
Stress
The force that causes Earth's crust to change its shape and/or volume
Tensional stress
The stress produced by two tectonic plates moving apart
Compressional stress
The stress produced by two tectonic plates coming together
Shearing stress
The stress produced by two tectonic plates sliding past each other horizontally
Deformation
The making of new deserts through a change in climate or destructive land use
Folding
The bending of rock layers due to stress in the Earth's crust
Faulting
The breaking of the Earth's crust and the sliding of the blocks of crust along the break
Fracture
A mineral's tendency to break along irregular surfaces;a break in the Earth's surface
Hanging wall
The land mass above the fault
Footwall
The land mass below the fault
Orogenesis
The process of mountain formation
Mountain range
A series of connected mountains
Plateaus
Large areas of flat-topped rocks high above sea level