The Heat Island Effect of a city, in which the people, buildings, factories, and vehicles in a city give off heat, while simultaneously dark surfaces of buildings and roadways absorb solar energy and release it slowly at night, creating a pocket of
hot air above the city, could be reduced by A) confining most automobile use to daylight hours.
B) confining most automobile use and heat-generating industrial activity to nighttime hours.
C) creating more urban parks and forests.
D) decreasing the albedo of building surfaces.
C
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Ice has a lower density than water because ice
A. molecules are more compact in the solid state. B. is composed of open-structured crystals. C. sinks. D. molecules vibrate at lower rates than water molecules.
Sorting describes
A. the layering in the sediment. B. the general shape of the clasts in the sediment. C. the size range of clasts in sediment.
When cities dumped sewage into natural waterways with limited capacity for dilution,
A) oxygen levels were severely lowered and most aquatic life died. B) the extra organic matter fertilized the region, which quickly filled in with new plants. C) the extra organic matter created fertile areas that attracted wildlife including migratory birds. D) bacterial growth greatly increased and the sewage was safely recycled into soil.
Pulverized rock and clastic materials ejected violently during an eruption are called
A) cinders. B) explosive debris. C) tephra, or pyroclastics. D) volcanic ash.