1 How long does ground beef last in the freezer for safety purposes? 2  The freezer time shown is for best quality only â foods kept constantly frozen at 0Â° F will keep safe indefinitely.
Lines of Longitude run from pole to pole (north-south) all the way around the globe and tell you your distance east or west from the âPrime Meridianâ. The Prime Meridian is Longitude Zero, and is a reference line from which longitude east and west are measured.
Longitude is measured from the Prime Meridian (which is the longitude that runs through Greenwich, England), with positive values going east (0 to 180) and negative values going west (0 to -180). So, for example, 65 degrees west longitude, 45 degrees north latitude is -65 degrees longitude, +45 degrees latitude.