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