Sand dunes can be formed by
air mass over Earth's surface movements in the earth's crust The bending of a ray of light Movement of an air mass pressure differences. Physical weathering looseness of dirt or compost remains of prehistoric life
A B C D E F G H
Winds are caused by pressure differences.
sand dunes can be formed by pressure differences.
Sand dunes can be formed by (A) air mass over Earth's surface (B) movements in the earth's crust (C) The bending of a ray of light (D) Movement of an air mass (E) pressure differences. (F) Physical weathering (G) looseness of dirt or compost (H) remains of prehistoric life