Weathering Weathering Vocabulary Weathering Physical Weathering Chemical Weathering

Weathering

Weathering Vocabulary • Weathering • Physical Weathering • Chemical Weathering • Oxidation • Acid Precipitation • Ice Wedging • • Abrasion Construction Destruction Sediment Erosion Gravity Deposition

Weathering Process by which rocks are broken down physically or chemically

Mechanical Weathering Rock is physically (something hitting it) broken down into smaller pieces. Physical_Weathering. asf

Mechanical Weathering What are the agents (causes) of mechanical weathering?

Causes of Mechanical Weathering 1. Ice (ice wedging – freezing and thawing) 2. Wind - Abrasion (the grinding of rock by other rock carried by wind, water, gravity, or ice. ) 3. Water - Abrasion 4. Gravity - Abrasion 5. Plants and Animals - burrowing

Chemical Weathering Rock breaks down through chemical reactions. Chemical_Weathering. asf

Chemical Weathering What are the agents (causes) of chemical weathering?

Agents of Chemical Weathering (Weak Acids) 1. Water (dissolves rock) 2. Air (oxidation from oxygen = rust) 3. Carbon Dioxide (carbonic acid in caves) 4. Living Organisms (produce acids like lichens) 5. Acid Precipitation (rain, snow, sleet, or hail with acid from fossil fuels)

Mechanical AND Chemical Weathering (plant roots push and make acid, water) http: //humanities. cqu. edu. au/geography/GEOG 11023/week_5_textbook. htm #1

Mechanical Weathering (ice) http: //www. kidsgeo. com/geology-for-kids/0066 -mechanical-weathering. php #2

Mechanical Weathering (Wind by abrasion) http: //adorons. com/wiki/Sedimentary_rock #1

Chemical AND Mechanical Weathering (plant acid and plant roots) #2 http: //www. earth. ox. ac. uk/~oesis/field/index. html

Mechanical Weathering (wind abrasion) http: //www. uh. edu/~jbutler/physical/chapter 6. html #1

Chemical Weathering (acid precipitation) http: //marlimillerphoto. com/chemical. html #2

Chemical Weathering (acid precipitation) http: //www. ux 1. eiu. edu/~cfjps/1300/weathering. html #1

Chemical Weathering (water dissolves limestone) http: //www. cartage. org. lb/en/themes/sciences/earthscience/geology/soils/Formation. Soils/Weathering. Soils/Chemical. Weathering/chemicalweathe ring. htm #2

Chemical Weathering (lichens) http: //www. cartage. org. lb/en/themes/sciences/earthscience/geology/soils/Formation. Soils/Weathering. Soils/Chemical. Weathering/chemicalweathe ring. htm #1

Chemical Weathering AND Mechanical Weathering (wind and oxidation – rust) http: //www. cartage. org. lb/en/themes/sciences/earthscience/geology/soils/Formation. Soils/Weathering. Soils/Chemical. Weathering/chemicalweathering. htm #2

What affects the rate rock weathers? § Type of Rock § Mineral composition – some minerals dissolve faster than others. § Permeable rock weathers easily because made of small air pockets. § Climate (average weather condition) § Wet, hot climates = faster weathering § Dry, cool climates = slower weathering