Weathering and Erosion. By: Mallory, Manoj, and Brandon

The two main external forces of change are Wind & Water

Weathering & Erosion The movements of wind and water include weathering and erosion.

Weathering Weathering is the process of which rocks break down into smaller pieces.

Types of weathering Physical Biological Chemical

Physical weathering. Physical weathering is the breaking down of rocks through direct contact.

Chemical weathering Chemical weathering changes the actual chemical make-up of rocks.

Types of chemical weathering Hydration Solution

Hydration Hydration is when minerals in the rock absorb water and expand, creating stress which causes the disintegration of rocks.

Solution Solution is a process by which minerals in the rocks dissolve directly in water.

Erosion Erosion is the process that picks up and carries away broken off pieces of sediment

Types of erosion Wind Water Glacial

Water Erosion Running water carves away the land much like a glacier.

Water Erosion The Grand Canyon Mississippi River Delta The Colorado River carved the walls of the canyon

Glacial Erosion Glaciers are huge masses of ice that carve the land. This is a glacier --

Glacial Erosion An example of a Glacial valley.