Glaciers advanced from Canada and retreated four or more times. Over a few million years, Puget Sound was carved and scoured by glaciers. Heavy Pressure. Glaciers containing up to 2,383 cubic miles of ice pushed over the Puget lowland.
AM stands for amplitude modulation, while FM stands for frequency modulation. In AM, the amplitude (the height or depth of the crests or troughs) changes, while in FM, the fre â¦ quency changes. Answered.
WHO (AM) WHO (1040 kHz Newsradio 1040) is a commercial AM radio station in Des Moines, Iowa. The station is owned by iHeartMedia and carries a news/talk radio format. The studios and offices are on Grand Avenue in Des Moines. The transmitter is on Northeast 120th Street in Mitchellville, Iowa.