Correct Response: B. The global positioning system (GPS) is a satellite-based navigational system that can give the latitude and longitude of a particular location. A handheld device receives signals from the satellites. This makes GPS technology useful for determining the latitude and longitude of a particular geologic outcrop. A storm system is typically monitored by Doppler radar (A) and not GPS because GPS requires a receiver to calculate position. Although GPS is useful in locating where field data is being collected by foresters and soil scientists, GPS is not in itself a tool for estimating the extent of forest cover (C) or calculating the soil's moisture content (D) because it only provides latitude, longitude, and time of day.
