ES April- Chapter 14.1 by April Hagemeister

weathering

april_hagemeist — 2013-04-26 16:44:20 UTC

the breaking down of rocks and other materials on the Earth's surface

mechanical weathering

april_hagemeist — 2013-04-26 16:44:45 UTC

a type of weathering in which the rocks break into smaller pieces but the chemical composition does not change

exfoliation

april_hagemeist — 2013-04-26 16:45:23 UTC

type of breaking off of rock

root-pry

april_hagemeist — 2013-04-26 16:45:41 UTC

type of organic activity where a plant growing in a crack in a rock can make the crack larger as the plant's roots grow and spread out

landslide

april_hagemeist — 2013-04-29 20:16:37 UTC

a large movement of loose rocks and soil

abrasion

april_hagemeist — 2013-04-29 20:16:57 UTC

the wearing away of rocks by solid particles carried by wind, water, or other forces

chemical weathering

april_hagemeist — 2013-04-29 20:17:26 UTC

when changes in the mineral composition or chemical makeup of rocks changes

oxidation

april_hagemeist — 2013-04-29 20:18:49 UTC

the process in which oxygen chemically combines with another substance

carbonation

april_hagemeist — 2013-04-29 20:19:12 UTC

the process when carbonic acid reacts chemically with other substances

stable rock

april_hagemeist — 2013-04-29 20:19:38 UTC

a rock that can resist chemical weathering

Weathering Facts

april_hagemeist — 2013-04-30 16:20:09 UTC

it's a slow continuous process; there are 2 types of weathering- mechanical and chemical;

Mechanical Weathering Facts

april_hagemeist — 2013-04-30 16:21:26 UTC

rocks are broken into different shapes and smaller pieces; temperature can break apart rocks; exfoliation- type of breaking off of rock, temperature causes this; frost action is a common cause of mechanical weathering; organic activity, gravity, and abrasion are also common factors for organic weathering

Chemical Weathering Facts

april_hagemeist — 2013-04-30 16:23:36 UTC

this weathering is the change of the chemical makeup or composition in a rock; water, oxidation, carbonation, sulfuric acid, and plant acids are all causes of chemical weathering

Rate of Weathering Facts

april_hagemeist — 2013-04-30 16:24:38 UTC

the rate depends on several factors: composition of the rocks, chemical makeup, stability, amount of time that rock is exposed on earths surface, and the amount of rock exposed