When you rub your hands together, you
A) can push harder on one hand than the other.
B) cannot push harder on one hand than the other.
C) need more information
Answer: B
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Life may be less likely around A- and F-type stars because
A) they emit large quantities of ultraviolet radiation B) they experience violent surface activity C) their habitable zones are very narrow D) rocky planets are unlikely to form around them
What is the most important reason why an icy moon is more likely to be geologically active than a rocky moon of the same size?
A) Ice has a lower melting point than rock. B) Ice is less rigid than rock. C) Ice contains more radioactive elements than rock. D) Ice is affected by tidal forces to a greater extent than rock. E) Ice is less dense than rock.
Which of the following is an expected consequence of global warming?
A) more extreme weather events, including extreme winter storms B) ocean water becoming more acidic C) an increase in sea level D) reduced ice coverage in the Arctic Ocean E) All of the above are expected consequences of global warming.
When you sit on a chair, the reaction to your weight is
A) zero if in equilibrium. B) the chair pushing on you. C) the Earth being pulled up. D) your push down on the chair. E) the floor pushing up on the chair.