A glacier transports rock and debris that build up to form a moraine.

Powerful waves crash into a rock with cracks. A layer of air gets trapped at the bottom of the crack. When the wave retreats, the air that was trapped is released with a powerful force and weakens the rock.

Water seeps into the cracks of a mountainside and freezes with cold temperatures. New and larger cracks develop.

Due to rain, the paint on an outside bench begins to crack.

Rock and debris from the side of a mountain are picked up by a moving glacier.

A rabbit burrows into the crack of a large rock and widens and splits the rock.

Dust and sand are blowing in the air during a wind storm.

The repeated motion of waves pick up loose sand from the beach.

A fast-flowing river carries silt and sand downhill. Once the river hits flatter land it forms an alluvial fan.

The roots of a plant grow in the cracks of a sidewalk. As the root grows larger the cement begins to crack.

Limestone begins to soften because of acid rain.

A delta is formed at the mouth of a large river.