Compléter Speeding GlaciersVersion en ligne LL Comp Build Know, Glaciers, Speeding Glaciers par Stephanie Turner 1 how when They length A scientist can tell fast a glacier can slide . A rock or stone on the glacier will slide past a stake in the sand . Scientists will use a clock to tell how fast the ice slides past . can track the of time it takes the glacier to pass the stake . They can tell us the glacier will get to the sea and melt .