EROSION & WEATHERING

Erosion is removable of rock particles by wind, ice, or gravity

There are two types of weathering:

Chemical

Mechanical

Abrasion refers to the grinding away of rock

Chemical weathering include actions of water, oxygen, & carbion dioxide

Oxidation- iron combines with oxygen in the presences of water

Oxidation- iron combines with oxygen in the presences of water

Soil is humus, the material that make the fertal soil

Soil is a mixture of rock, minerals, material, water ,and air

Soil is a mixture of rock, minerals, material, water ,and air

SECTION 3

• A natural resource is anything I the environment that we use
• Soil is one of earths most valuable natural resources
• Fertle soil is valuable because most things depend on it
• Whenever soil is exposed water and wind can quickly erode it

CHAPTER 8 VOCAB

CHAPTER 9

Weathering, erosion, & deposition act together in a cycle that wears down

Deposition occurs where the agents of erosion, deposit, or lay down

SECTION 2

• Moving water is the major agent of the erosion that has shaped earth
• Runoff- water that moves over earths surface.
• Rills- runoff travels form tiny grooves in the soil
• Stream- channel along which water is continually flowing
• Gully- large groove or channel in the soil that carries runoff

SECTION 2

• Tributary- is a stream or river that flows into a large river
• Through erosion, a river creates valleys, water falls & food plains
• Flood plain- flat wide area of land along the river
• Deposition creates landforms such as alluviall, fans, and deltas.
• It can also add soil to a rivers flood plain

SECTION 3

• A slope is were the hight of a river gently increases
• Volume of flow is how fast the water is
• Streamed shape is the friction between the steamed
• When water erodes and picks up sediment

SECTION 4

• continental glaciers: is a glacier that covers some continent

Section 5
The energy in waves comes from wind that blows across the water's surface

Waves shape a coast when they deposit sediment

It forms coastal features such as beaches, spit, and barrier beaches

Wind can erode places by deflation and abrasion

Wind erosion and deposition may form sand dunes and loess deposits

Abrasion by wind-carried sand can polish rock

Flood plain: wide valley through which a river flows

Meander: loop like bend in the course of a river

Oxbow lake: meander cut off from a river

Alluvial fan: wide, sloping deposit of sediment formed where a stream leaves a mountain

Delta: landform made of sediment that is deposited where a river
Flows into an ocean or lake

Runoff: Water that flows over the ground surface rather than soaking into the ground.

Rill: tiny groove in soil made by flowing water.

Gully: large channel soil formed by erosion

Stream: channel through which water is continually flowing down hill

Tributary: stream or smaller river that feeds into a main river

Ground water- water that fills the cracks and spaces in underground soil and rock layers

Stalactite- calcite deposit that hangs from the roof of a cave

Stalagmite- cone shaped deposit that builds up

Karst topography- region in which a layer of limestone close to the surface creates deep vallys