What destroyed the Roman town of Pompeii in 79 AD?
A. A pyroclastic flow
B. A mudflow
C. An enormous lava flow
D. A landslide
Answer: A
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Why does wave refraction occur?
A) Wave lines approach shore and enter into different depths B) The density of the wave alters in shallow water C) Waves break perpendicularly to the shore D) All of these choices
Which of the following igneous rocks can be composed of fragments?
A. scoria B. volcanic breccia C. tuff D. All of these choices are correct.
Hurricanes are called major hurricanes if ________.
A. last more than 4 days B. are classified as category 3 or above on the Saffir-Simpson Scale C. they have air pressures greater than 980 millibars D. the wind speeds are at least 120 km/hr E. they make landfall at high tide
________ is the term for the physical amount of plant material at a location
A) Biomass B) Intraspecific composition C) Biota D) Biome E) Biology