What are the zone of accumulation, zone of wastage (or ablation), and firn limit?

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Quizplus · Accepted Answer

The Answer is The upper part of a glacier is the zone of accumulation, where the addition of snow exceeds losses and the surface is perennially snow covered. The lower part of a glacier is the zone of wastage (or ablation) where snow is lost from melting, sublimation, and calving of icebergs in excess of the amount that zone accumulates. Snow accumulates in winter but melts in spring and summer. The elevation to which snow recedes during the wastage season is the firn limit.

What Are the Zone of Accumulation, Zone of Wastage (Or