A rigid, but moving piece of the earth's crust.

Plate Tectonics theory

The theory of the formation and movement of the plates that cover the Earth's surface.

Hypothesis that earth's continents have slowly moved over time.

A plate boundary where two plates move away from each other.

A plate boundary where two plates move toward each other.

A plate boundary where two plates slide past each other.

A deep valley that forms at a divergent plate boundary.

The circular movement of a liquid or gas substance caused by differences in temperature. (ex. lava lamps)

Deep oceanic valley that forms where oceanic plates are subducting.

Underwater chain of mountains that forms at divergent plate boundaries.

The scientist who developed the idea of continental drift.

The name of a single landmass that broke apart 225 million years ago.

The process in which an oceanic plate sinks beneath a less dense plate at a convergent plate boundary.

The process by which new ocean floor is being created at divergent plate boundaries.

Maps that show contour lines for elevation.

A line that connects points of equal value. On a topographic map these lines connect points of equal elevation.

A landform usually in the shape of a bird's foot created by the deposition of sediment at the mouth of a river.

The rapid movement at a plate boundary or fault that releases waves of energy across the earth.

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Geology

Unit 7 Geology

Question	Answer
plate	A rigid, but moving piece of the earth's crust.
Plate Tectonics theory	The theory of the formation and movement of the plates that cover the Earth's surface.
Continental Drift	Hypothesis that earth's continents have slowly moved over time.
divergent boundary	A plate boundary where two plates move away from each other.
convergent boundary	A plate boundary where two plates move toward each other.
transform boundary	A plate boundary where two plates slide past each other.
fault	A break in the earth's crust.
rift valley	A deep valley that forms at a divergent plate boundary.
convection current	The circular movement of a liquid or gas substance caused by differences in temperature. (ex. lava lamps)
trench	Deep oceanic valley that forms where oceanic plates are subducting.
mid-ocean ridge	Underwater chain of mountains that forms at divergent plate boundaries.
Alfred Wegener	The scientist who developed the idea of continental drift.
Pangaea	The name of a single landmass that broke apart 225 million years ago.
subduction	The process in which an oceanic plate sinks beneath a less dense plate at a convergent plate boundary.
seafloor spreading	The process by which new ocean floor is being created at divergent plate boundaries.
topographic map	Maps that show contour lines for elevation.
contour line	A line that connects points of equal value. On a topographic map these lines connect points of equal elevation.
delta	A landform usually in the shape of a bird's foot created by the deposition of sediment at the mouth of a river.
Earthquake	The rapid movement at a plate boundary or fault that releases waves of energy across the earth.

Created by: dmiles

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