On land, a traveler would notice a decrease in primary productivity by traveling from the tropics to higher latitudes
a. True
b. False
Indicate whether the statement is true or false
True
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Which of the following was NOT a key factor in the rise of the American manufacturing core in the early 20th century?
A) its increased connectivity to a growing network of roads and canals B) its location in a warm climate with year-round fair weather for production C) its proximity to natural resources (ex. coal, iron ore) D) its location in an existing population center in order to draw on an existing labor supply E) its location near to the Great Lakes to allow for transport of cargo
Secondary waves can travel through all areas of the Earth except the
A. inner core. B. mantle. C. outer core. D. surface.
In the context of science, how would you classify the following statement? Iridium is present in relatively high concentrations in 65 million year old rock layers in several different locations on Earth.
A. hypothesis B. theory C. observation
The cleanup of hazardous waste accumulated in orphan sites is complicated because
A) most of the waste is buried below the water table. B) there is no responsible party to clean up the waste. C) the chemicals have evaporated before they could be removed. D) there are no longer places available to dispose of hazardous wastes.