Composite volcanoes erupt explosively. What kind of magma do you conclude that composite volcanoes must contain?
A. ancient magma
B. magma that is mostly liquid
C. thick, sticky magma rich in solids and gas
D. magma made of cement
Answer: C
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A drought defined based on the supply and demand of water resources is a(n)
A) meteorological drought. B) agricultural drought. C) hydrological drought D) socioeconomic drought.
Based on shoreline deposits from 125,000 years ago, scientists believe that the sea will ________ before the next ice age
A) rise 5-6 meters B) rise 10-12 meters C) drop 1-2 meters D) drop 10-12 meters
Fast mass wasting events involving cohesive or semicohesive units of Earth materials are called _____
a. solifluction b. falls c. slides d. flows e. avalanches
The Middle East has about ________ percent of the world's oil reserves.
A. 72 B. 62 C. 50 D. 90