The Union for Concerned Scientists (UCS) maintains the Satellite Database-a listing of the more than 1,000 operational satellites currently in orbit around Earth. Several of the many variables stored in the database include country of operator/owner, primary use (civil, commercial, government, or military), class of orbit (low earth, medium earth, or geosynchronous), longitudinal position (degrees), apogee (i.e., altitude farthest from Earth's center of mass in kilometers), launch mass (kilograms), usable electric power (watts), and expected lifetime (years). Which of the variables measured are qualitative? Which are quantitative?