What Determines the Speed of a Glacier?

Imagine a giant block of ice slowly sliding down a hill. It doesn't just fall; it creeps. This happens because two things work together: the ice inside bends and breaks apart (like crushing a snowball), and the bottom slides over rock or water.

The top part moves faster than the bottom. Basal slip is like sliding a book across a table with some butter underneath. If there is meltwater, it acts as a lubricant, making the glacier slide much faster.

Steep hills make gravity pull harder, speeding up the flow. Warm ice at the bottom creates more water, which reduces friction. Cold glaciers stick to the ground and move slower because they are frozen tight.