Star dunes ____
a. have only been found on Mars
b. are the smallest type of sand dune
c. have long arms stabilized by vegetation
d. have multiple slip faces
d
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A current of 20 amperes is the rate of flow of
A. 20 joules per second. B. 20 newtons per coulomb. C. 20 ohms per second. D. 20 volts per coulomb.
The greater thickness of what kind of rocks causes the continents to have higher surface elevations than the oceanic crust?
A) sial B) metamorphic C) igneous D) sima
Tornadoes typically form with: a. strong vertical wind shear
b. a conditionally unstable environment. c. severe thunderstorms. d. All of these choices.
While standing at the Tropic of Cancer, Emma's shadow points north at noon (Sun time). Based on this, which of the following can be definitely concluded?
A) It must be the summer solstice. B) It must be the winter solstice. C) It must be one of the equinoxes. D) It must not be the summer solstice. E) It must not be the winter solstice.