What is the name of a sudden, highly energetic, eruptive explosion on the surface of the Sun?
A. granulation
B. flare
C. sunspot
D. coronal hole
Answer: B
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Why are dissolved gases present in magma, but not lava?
A) The gases condense to form liquids once magma hits the earth's surface. B) The gases escape once magma hits the earth's surface. C) The gases combust once magma hits the earth's surface. D) The gases crystallize once magma hits the earth's surface.
A subsidence inversion
A) increases pollutant concentration aloft and decreases pollutant concentration near the surface. B) decreases pollutant concentration aloft and increases pollutant concentration near the surface. C) increases pollutant concentration both aloft and near the surface. D) decreases pollutant concentration both aloft and near the surface.
Which potential geologic hazard is NOT represented by a feature on this figure?
A. an earthquake B. a volcano C. contaminated groundwater D. flood-prone areas E. a landslide
Which of the following geologic resources was discussed for the area around St. George, Utah?
A. a large cement plant B. an oil field and floodplains with fertile soils C. floodplains with fertile soils D. oil field E. All of these choices are correct.