Ques:Answer the following question given this paragraph: The warm-air vent is placed near the floor of the room. Warm air is less dense than cold air so it rises. If the warm-air vent were placed near the ceiling instead, how would this affect the transfer of thermal energy throughout the room?. Q: What property of warm air causes it to rise above cold air? Choices: - greater pressure - greater density - higher temperature - lower density A:

Ans:lower density
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Ques:Answer the following question given this paragraph: Spring tides occur during the new moon and full moon. The Sun and Moon are in a straight line either on the same side of Earth or on opposite sides. Their gravitational pull combines to cause very high and very low tides. Spring tides have the greatest tidal range. Q: What tides occur during the new moon and full moon? Choices: - autumn - high - bottom - spring A:

Ans:spring
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Ques:Answer the following question given this paragraph: Divergent plate boundaries produce huge mountain ranges under water in every ocean basin. Q: What type of plate boundaries produce huge mountain ranges in the ocean basin? Choices: - coherent - parallel - tractional - divergent A:

Ans:divergent
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Ques:Answer the following question given this paragraph: Sympatric speciation occurs when groups from the same species stop mating because of something other than physical or geographic separation. The behavior of two groups that live in the same region is an example of such separation. The separation may be caused by different mating seasons, for example. Sympatric speciation is more difficult to identify. Q: What occurs when groups from the same species stop mating because of something other than physical or geographic separation? Choices: - extinction - complementary speciation - invasive speciation - sympatric speciation A:

Ans:
sympatric speciation
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