What does VEI stand for?
a. Volcanological Equipment Incorporated
b. Virtual Earth Interferometry
c. Volcanic Explosivity Index
d. Vanity Engenders Insecurity
e. Volcanic Engineering Institute
C
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A secondary rainbow is dimmer than the primary rainbow because
A. it is larger, and its energy spreads across more area. B. it simply has much less energy than the primary bow. C. of a double reflection and refraction in the drops. D. its colors are inverted.
In La Conchita, California, landslides have been precipitated by ____
A)periods of heavy rainfall B)earthquakes C)deforestation D)dam failures E)fracking
What causes magnetic stripes on the seafloor, such as those shown here?
A. Volcanic rocks in oceanic crust are covered by a variable thickness of sediment. B. Some oceanic crust consists of volcanic rocks and some is composed of sediment. C. Some volcanic rocks are formed in normal ways and others have pillows. D. Sometimes Earth's magnetic field points north and sometimes it points south.
Irrigation can result in the salinization of soils because ________
A) irrigation is typically used in areas where windblown salts from sea spray can accumulate when the protective vegetation is removed B) many of the plants grown in these regions excrete salts into the soil C) the irrigation water washes away soil leaving behind concentrated salts D) salts in the water are deposited on the soil surface as water evaporates E) shortages of fresh water require the use of saltwater for irrigation