Limestone begins to soften because of acid rain.

Sediment is picked up from the river banks of a flowing river.

Ice melts in the crack of a large boulder & carries away loose sediment.

Layers of sand form at the bottom of an ocean.

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

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

Wind carries sand & forms a sand dune.

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

Dust & sand are blowing in the air during a windstorm.

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

Rocks & debris from the side of a mountain are picked up by a moving glacier.

Loosened rock from icy temperatures is pulled down a mountainside by gravity.

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

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

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 & weakens the rock.

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

Ice melts in the crack of a large boulder & carries away loose sediment.