The Dynamic Earth

An underwater or exposed ridge of sand, gravel, or shell material.

• dunes

• sandbar

• barrier island

A mass of material deposited in a triangular or fan shape at the mouth of a river or stream.

• delta

• load

Made up of living things and the areas of Earth where they are found.

• geosphere

• biosphere

• hydrosphere

 A large mass of moving ice that forms by the compacting of snow by natural forces.

• arete

• cirques

• glacier

Process by which eroded material is dropped in a new location.

• deposition

• erosion

• gradient

The place where land and a body of water meet.

• waves

• sandbar

• shoreline

The mostly solid, rocky part of Earth.

• hydrosphere

• atmosphere

• geosphere

• biosphere

 The extremely slow movement of material down-slope.

• rockfall

• creep

• landslide

The process by which other chemicals combine with oxygen.

• oxidation

• acid precipitation

• abrasion

A rapid movement of a large mass of mud.

• mudflow

• creep

• load