Part 1

Rachael McGinnis

Definitions

Weathering- The various mechanical and chemical processes that cause exposed rock to decompose

Erosion- a process in which the materials of Earth's surface are loosened, dissolved, or worn away and transported from one place to another by a natural agent, such as wind, water, ice, or gravity

Deposition- The process in which material is laid down

Types of Chemical Weathering

Chemical Weathering- The process by which rocks are broken down by chemical reactions.

Water- broken down by water

Wind- When wind blows sand and silt against exposed rock, the sand eventually wears away the rock’s surface.

Air- The oxygen in the air is reacting

Acids- These acids react with rocks in the ground

Examples and Pictures of Chemical Weathering

Mechanical Weathering

Types of Mechanical/Physical Weathering

Mechanical Weathering-any of the various weathering processes that cause physical disintegration of exposed rock without any change in the chemical composition of the rock

Ice-Gouging. Ice digs into the ground and scratches it. Plucking-Ice picks up rocks off of the ground and takes it.

Living Things-Plants(root pry). Roots break the rock. Animals. Digging in the ground

Water-Movement(abrasion). Water weathers the surface of the rock.

Air-(wind). Air moves and breaks something off of a rock.

Examples and Pictures of Mechanical/Physical Weathering

Types of Erosion

Erosion-The moving of sediment to a new location

Water

Wind

Ice

Living Things

Gravity

Types of Deposition

Deposition- the geological process in which sediments, soil and rocks are added to a landform or land mass. Wind, ice, and water, as well as sediment flowing via gravity, transport previously eroded sediment, which, at the loss of enough kinetic energy in the fluid, is deposited, building up layers of sediment.

Water

Ice

Wind

Gravity

Living Things