1) 1- .................depends on satellites to determine the locations of things. a) Magnetometer   b) Ground Penetrating Radar  c) Drones  d) Global Positioning System (GPS 2) GPS relies on .................to determine places and locations. a) Measuring the magnetic field   b) Radar c) Drones d) Satellites 3) The device.................is used to detect coins underground. a) Satellites  b) GPS c) Drones - d) Magnetometer 4) Archaeologists depended on ................ to search for minerals underground. a) Airplanes  b) Photographs c) Global Positioning System d) Magnetometer

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