Test Yourself On Oceanography Vocabulary for First Exam Flashcards

Matching (20) Match items in column A to column B

Column a	Column b
1. the rigid portion of Earth's mantle below the astehonsphere.	A. shadow zone
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2. a very large mantle plume	B. uniformitarianism
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3. time required for one-half of all the unstable radioactive nuclei in a sample to decay.	C. isostatic equilibrium
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4. The formation of layers in a material, with each deeper layer being denser (weighing more per unit of volume) than the layer above.	D. absolute dating
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5. the brittle, relatively cool outer layer of Earth, consiting of the oceanic and continental crust and the outermost, rigid layer of mantle	E. voyaging
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6. a tightly condensed knot of material that has not yet attained fusion temperature.	F. outgassing
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7. a fracture in a rock mass along which movement has occurred.	G. soundings
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8. the name of our galaxy; sometimes applied to the field of stars in our home spiral arem, which is correctly called the orion arm	H. Milky Way galaxy
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9. a sudden motion of earth's crust resulting from waves in Earth caused by faulting of the rocks or by volcanic activity.	I. half-life
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10. measurement of the depth of a body of water	J. lithosphere
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11. the wide band at Earth's surface 105 degrees to 143 degrees away from an earthquake in which seismic waves are nearly absent. P waves are absent beause they are refracted by Earth's liquid outer core; S waves are absent from this band and the zone immediately opposite the earthquake site because they are absorbed by the outer core	K. continental drift
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12. a surface expression of a plume of magma rising from a stationary source of heat in the mantle	L. seismograph
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13. Balanced support of lighter material in a heavier, displaced supporting matrix; analogous to buoyancy in a liquid	M. superplume
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14. the theory that the continents move slowly across the surface of the earth	N. continental rise
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15. the wedge of sediment forming the gentle transition from the outer (lower) edge of the continental slope to the abyssal plaing; usually associated with passive margins	O. fault
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16. the theory that all of Earth's geological features and history can be explained by processes occurring today and that these processes must have been at work for a very long time.	P. density stratification
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17. the volcanic venting of volatile substances	Q. hot spot
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18. traveling on the ocean for a specific purpose	R. earthquake
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19. deteremining the age of a geological sample by calculation radioactive decay and/or its position in relation to other samples	S. lower mantle
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20. an instrument that detects and records earth movement associated with earthquakes and other disturbances	T. protostar
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Oceanography Vocabulary For First Exam

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Oceanography Vocabulary For First Exam

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