Which of the following igneous rocks would be formed by the fastest cooling?
A. very coarse granite pegmatite
B. volcanic glass
C. fine-grained granite
D. medium-grained granite
E. coarse granite
Answer: B
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A 1-kg ball is tossed straight upward at 10 m/s. Neglecting air resistance, the net force that acts on the ball when halfway to the top of its path is
A. 1/2 N. B. 5 N. C. 10 N. D. 1 N.
Infectious disease accounts for ________% of deaths globally
A) less than 1 B) almost 17 C) almost 50 D) almost 64 E) almost 79
Geographically speaking, the most important currents ________
A) involve subsidence B) involve upwelling C) are caused by tides D) are caused by underwater earthquakes E) are the flows making up the oceans' general circulations
Which of the following is a closed system?
A. An underwater ocean cave B. a forest habitat C. an aquarium D. A cave with abundant life that was sealed off from the outside world during a landslide 100 years ago.