The most striking valley in the solar system is:
A) the Grand Canyon in Arizona.
B) Gwenivere on Venus.
C) the Discovery Scarp of Mercury.
D) Valles Marineris on Mars.
E) Valhalla on Callisto.
D
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Electrons flow in a wire when there is
A) an imbalance of charges in the wire. B) a potential difference across its ends. C) a difference in potential energy across its ends. D) none of the above
A magnifying glass can be made from a diverging lens
Indicate whether the statement is true or false
Similar to the crystallization of silicate minerals, the crystallization of evaporite minerals occurs in a step-by-step process. The evaporite minerals that are the most difficult to dissolve
A) precipitate last. B) precipitate first followed by the minerals that dissolve more easily. C) have the lowest solubility and are the last to precipitate. D) have the highest solubility and are the first to precipitate.
The type of fossilization that occurs when the remains of an organism are replaced by mineral matter is called
A) carbonization. B) replacement. C) an impression. D) a cast.