Ice Wedging Water fills joints of rocks and freezes Freezing expands the water by 10% Repeated freeze and thaw cycles over the years causes rock to break
along joint Mechanical - Exfoliation Exfoliation or unloading Rock breaks off into leaves or
sheets along joints which are parallel to the ground surface Mechanical - Thermal Thermal expansion Repeated daily heating and cooling of rock
Different minerals expand and contract at different rates causing the rock to split Mechanical - Biotic
Biotic means life Weathering caused by living organisms Plant roots, digging animals, microscopic plants and animals, algae and fungi.
Mechanical Weathering What is Chemical Weathering? Breakdown of rock into smaller pieces because of change in the chemical composition of its minerals.
Chemical reactions break down the bonds holding the rocks together, causing them to fall apart. Chemical weathering occurs in all types of rock but smaller rocks are more susceptible because they have a greater amount of
surface area. Chemical Weathering Types of chemical weathering
Oxidation (oxygen) Hydrolysis (water)
Carbonation (carbon dioxide) Biotic (living organisms) Acid rain Chemical - Oxidation Oxidation - oxygen combines with
other elements in rocks to form new types of rock. Causes a rusting of the rock, often causes a color change in the rock Chemical - Hydrolysis
Hydrolysis - water combines with the substances in rocks to form new types of rock New substances are softer than the original rock types
Chemical - Carbonation Carbonation Carbon dioxide is dissolved in water making carbonic acid, which eats away at the rock Weak acid is formed when carbon dioxide in the air mixes with rain. This is the same
acid found in soft drinks. Chemical - Biotic Organisms - living organisms can cause changes in the chemistry of rock Plants lower the local pH to make it more
acidic Bacteria act as catalysts in various geochemical processes Chemical Weathering
Weathering by Water Most important agent of chemical weathering It can dissolve rock and minerals in rock Weathering by Waves Waves weather the land:
Mechanical weathering Broken down into smaller pieces Chemical weathering Dissolved in water
Weathering by Waves Weathering by Wind Wind weathers the land by mechanical means Abrasion
Very slow process Weathering by Wind Erosion
What Caused This? http://commons.wikimedia.org/wiki/ File:Water_erosion_below_Hay_Bluff_-_geograph.org.uk__1074175.jpg
It is becoming the UCSF campus solution for electronic signatures. ... Check the box to select the template and then click . Add. ... Salesforce at UCSF An overview of the Salesforce platform and how it's being used across campus
The Report on Candidacy Exam will become available in GRADFORMS to your Dissertation Advisory Committee at the time of the exam. Note: All committee members must log into GRADFORMS.OSU.EDU to report the results of your exam prior to leaving the...
Background. Achieve | 2014 Closing the Expectations Gap. This is the ninth year that Achieve has surveyed all 50 states and reported on state progress in adopting college- and career-ready standards, graduation requirements, assessments, and accountability and data systems.
All assessment material pertaining to each placement along with module descriptors is accessible to the student on each practice education module MOODLE page. Prepare and send an introductory email to the appropriate practice education coordinator . not less than five...
an eager desire to know or learn. Ella was full of curiosity about the world around her and liked to examine things closely. curiosity . WordDefinition. PictureSentence. Full of glory, magnificent. The weather was . glorious, sunny, and warm with...
The housing would be like all furnished Studio rooms or Suites 1 / 2 bed rooms A historical vision Harvard Madinah Al Azhar Islamabaad Cambridge Mumbai Pune Maryland The Konkan, also called the Konkan Coast or Karavali The Konkan, is...
Bt brinjal Common Vegetable Grown in all vegetable-growing zones in India but prominently in 8 States: Andhra Pradesh, Bihar, Karnataka, Maharashtra, Orissa, Tamil Nadu, Uttar Pradesh and West Bengal 25 - 80 rounds of pesticides sprayed on brinjal crop during...
The Nez Perce tribe mostly lived in dome-shaped houses made from earth materials called earth houses. These were permanent homes. They sometimes lived in tepees, but only when they hunted and needed to move around to follow buffalo herds.These houses...
Ready to download the document? Go ahead and hit continue!