St. Petersburg oriented Russia toward the ________ due to its location on the Baltic Sea
A) west
B) east
C) south
D) southeast
A
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In general, the longitudinal profile of a stream (i.e., elevation change along its length) is concave up.
a. true b. false
The 1991 eruption of Mount Pinatubo in the Philippines ________ the global albedo, resulting in a temporary ________ of Earth
A) increased; cooling B) decreased; warming C) increased; warming D) decreased; cooling
Why is ice less dense than water?
A. As water freezes, it forms cubic crystals made only of eight atoms. These atoms weigh less in ice than in water. B. Water molecules lose one of their hydrogen atoms when they form ice, making the solid form less dense than the liquid form. C. When water freezes, the molecules arrange into a crystal form in which they are farther apart than in liquid water. D. As a solid, ice is actually more dense than water, but will still float due to the high surface tension of water.
The mineral fluorite is commonly sold in mineral shops as octahedral (8-sided) objects. This shape originates from ________
A) the growth of fluorite in caves and is the form the crystals grow in the open cavern B) cutting a larger crystal along four perfect cleavage planes, forming a cleavage fragment C) the typical crystal form of fluorite D) a pseudomorph (false form) of fluorite from replacement of a salt, potassium chlorite, that grows in octahedral crystals