Islands are created by a process called Soil Building, which is the S in STEW. They can also be formed by underwater eruptions and earthquakes. Islands may become home to human life and be a tourist attraction as well.

A valley is a depression of land in between mountain ranges or other obstacles. It usually contains a river. If the valley is inhabited, it creates shade for the humans due to the low elevation. It also provides fertile soil for farmland.

Island

Valley

Delta

Plateau

Mandatory 5-7 Optional 1

A delta is the mouth of a river. It is involved in soil building and Erosion. It ships the soil out to the body of water which the river is feeding. Deltas also cause flooding, which may destroy crops.

A plateau is an elevated area of land with cliffs. It is usually at a higher elevation than nearby land.They may be found mainly in the Southwestern United States. An example is the Grand Canyon. The processes involved are erosion, weathering, and tectonics.