Water will seep into a small crevice in a rock. At night, the water freezes and . During the day, water will melt. When this pattern keeps repeating, it will eventually crack the rock open. This is called weathering.

Water will seep into a small crevice in a rock. At night, the water freezes and EXPANDS. During the day, water will melt. When this pattern keeps repeating, it will eventually crack the rock open. This is called MECHANICAL weathering.

C.about 10% i think

Asmall closed hole formed in an outwash plain or moraine. forms when a  glacier retreats then remains stationary.