In the 1906 San Francisco earthquake, much of the damage was due to fires because ________
A) water lines were badly damage so that firemen could not put out the fires
B) electric power lines fell and caused sparks that started fires
C) the shaking caused gas lines to rupture everywhere and these ignited to cause huge fire storms in the city
D) a cow kicked over a lantern in a barn and started the fires
A
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Of the following, which of the following generally has the highest population density?
A) core countries B) peripheral countries C) urban areas D) rural areas E) areas with high birth rates
With the Linnaean classification scheme, as one moves down the hierarchy, the categories become more ____
A)exclusive B)poorly defined C)inclusive D)general E)broad
In which of the following types of bonding do atoms share one or more electrons?
A. metallic B. intermolecular C. covalent D. ionic
If sediment is from natural sources, why is it considered a water pollutant?
A) it is an out-of-place resource B) it is toxic at its source, so it is also toxic in the water C) it is usually laden with mercury D) it is only a pollutant if it contains agricultural chemicals