-Zone of accumulation = Upper part of glacoer where mass is added.
-Zone of ablation = Lower part of glacier where mass is lost.
-Zone of equilibrium = Area where mass added is equal to mass lost.
-Net glacial balance = The overall mass lost or gained by a glacier.
-Positive mass balance = In Winter, there is more accumulation than ablation. Mass is added so the glacier advances.
-Negative mass balance = In Summer, there is more ablation than accumulation. Mass is lost so the glacier…