What causes glaciers to move?

Glaciers act like a system with accumulations and ablations.

Accumulations (inputs):

• Snow - become compacted as more snow settles on top. Air is expelled and the individual snowflakes turn into granular ice crystals. The becomes denser and eventually turns into clear glacier ice.
• Avalanches.

Ablations (outputs):

• Melting - occurs near the snout of the glacier where the air temperature…