Weathering and Erosion

More surface area; more weathering

Break down of rock over tiime

Chemical

Oxidation

Rust!

Acid reactions

Dissolves

Mechanical

Physical; into smaller peices

Disintegrates; no change in composition

Frost wedging

water gets in

water frezes, expands

Freeze and thaw cycles

Exfoliation and unloading

Rock weathers away

Less weight and pressure

Breaks into sheets and slabs

Organic activity

Roots; animals

Glacier

Description

parallel grooves; scratched and polished

Rate of melting = Rate of moving

Huge rock conveyor belts of ice

Type

Continental

Large; spread out like a pancake (flat suface)

Valley or Alpine

small; in between valleys

Moraines

Dark bands: Rocks

Usualy on the outer edge

Terminal

Rock and debris at the furthest point the glacier has reached

Medial

In the middle of the glacier

Landforms

Fingerlakes

Giant, long, deep, glacial grooves; makes lakes

Till

Pile of debris left behind; unsorted

Erratics

Large rocks; unrelated placement

Drumlins

Mounds and hills of tills

Kettle lakes

ice melt in own hole

Fjord

U-shaped valley filled with water

Waves

Wind

Mass Movement

Water

Runoff

What affects runoff?

The intensity and duration of rainfall

The water content of soil

Slope of land

Vegetation

Stream devlopment

Over time, continuos hill erosion leads to the devlopment of a stream

stream = any channelized flow of water

Types depend on shape, speed, volume of water.

Longitudinal Profile-the side view fom head to mouth.

Gradient

slope of stream

steep at head; flat at mouth

V-shaped land

Young streams

Ground water

Subtopic