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Crust (geology): Quiz


Question 1: The temperature increases by as much as 30°C (about 50°F) for every kilometer locally in the upper part of the crust, but the ________ is smaller in deeper crust.
Geothermal powerEnhanced geothermal systemGeothermal gradientGeothermal electricity

Question 2: Because of ________ in the underlying plastic (although non-molten) upper mantle and asthenosphere, the lithosphere is broken into tectonic plates that move.

Question 3: The ________ form much of the crust.
KomatiiteBasaltCumulate rockIgneous rock

Question 4: In ________, a crust is the outermost solid shell of a rocky planet or moon, which is chemically distinct from the underlying mantle.
NatureEarthEarth scienceGeology

Question 5: [6] Continental crust is enriched in incompatible elements compared to the ________ ocean crust and much enriched compared to the underlying mantle.
Flood basaltLavaIgneous rockBasalt

Question 6: The boundary between the crust and mantle is conventionally placed at the Mohorovičić discontinuity, a boundary defined by a contrast in ________ velocity.
Reflection seismologySeismic waveSeismologyEarthquake

Question 7: The crust of the ________ is composed of a great variety of igneous, metamorphic, and sedimentary rocks.

Question 8: The best-characterized and most voluminous of these later additions are the mare ________ formed between about 3.9 and 3.2 billion years ago.
Flood basaltIgneous rockLavaBasalt

Question 9: There is no evidence of crustal formation or deformation due to ________.
Plate tectonicsNorth American PlateEarthGeology

Question 10: This article incorporates text from the Encyclopædia Britannica, Eleventh Edition, a publication now in the ________.
Public domainCopyrightCopyright infringementIntellectual property


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