What would Jupiter have needed to be a star?
A. a larger satellite system
B. more uranium to ignite nuclear fission chain reactions in its core
C. enough more mass to make the planet hotter
D. a slower spin, similar to the Sun's 25 days, instead of its present 10 hours
E. a different chemical composition
Answer: C. enough more mass to make the planet hotter
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Which of the below correctly describes the ice in a mountain glacier?
A) never stops moving downhill B) moves downhill only during times of high temperature C) moves downhill when snow accumulation exceeds ablation D) On the average, it moves downhill once every hundred years. E) never stops moving uphill
Which represents the proper pressure cell arrangement for the Hadley Cell?
A. low pressure at A, low pressure at B B. high pressure at A, low pressure at B C. low pressure at A, high pressure at B D. high pressure at A, high pressure at B
When a hydronium ion concentration equals 1 × 10-10 moles per liter, what is the pH of the solution? Is the solution acidic or basic?
A) The pH of this solution is 4, which is acidic. B) The pH of this solution is 8, which is basic. C) The pH of this solution is 6, which is acidic. D) The pH of this solution is 10, which is basic.
During the next magnetic reversal, the magnetic force field surrounding Earth will shift by about ________.
A. 360° B. 45° C. 180° D. 90° E. 270°