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| Description: Masses of warm and cold air collide, producing fronts. Cooler, denser air acts as a barrier over which the warmer, less dense air rises. This process is called frontal lifting. Picture Stats: Views: 220 Filesize: 91.36kB Height: 519 Width: 1053 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=31143 |