WeatheringWeathering

By: Katherine PeaseBy: Katherine Pease

77thth Grade Plummer Middle Grade Plummer Middle SchoolSchoolhttp://www.geosci.unc.edu/faculty/glazner/Images/Weathering/weathering.html

What is Weathering?What is Weathering?Weathering Weathering _________________________________________________________________________________________________________________________________________________________._____________________.

http://www.geosci.unc.edu/faculty/glazner/Images/Weathering/weathering.html

A wooden post that soaked for many years in a pool of brine in Owens Lake (dry), eastern California. The grotesque swelling of the wood results from deposition of salts in the wood.

What are the two main types of What are the two main types of weathering?weathering?

_________We_________Weatheringathering

_________We_________Weatheringathering

http://www.geography4kids.com/files/land_weathering.html

Mechanical Weathering, Mechanical Weathering, what is that?what is that?

It is the process of It is the process of ______________________________________________________________________________________________________________________________________________________________________________________

What causes this mechanical What causes this mechanical weathering to happen?weathering to happen?

AbrasionAbrasionPlantsPlantsAnimalsAnimalsWedgingWedgingWaterWaterWindWindIceIce

What is Abrasion?What is Abrasion?

AbrasionAbrasion refers to the refers to the ____________________________________________________________________________________________________________________________________________________________________________________________

How do plants and animals cause How do plants and animals cause mechanical weathering?mechanical weathering?

Roots and plants Roots and plants _____________________________. _____________________________. They act like They act like ____________ and push and push the rocks apart. the rocks apart.

Little animals also help by Little animals also help by ________ and ________ through ________ and ________ through the ground. the ground. http://www.geography4kids.com/files/land_weathering.htmlhttp://www.geography4kids.com/files/land_weathering.html

How does wind cause mechanical How does wind cause mechanical weathering?weathering?

Some rocks that are Some rocks that are composed of soft minerals or composed of soft minerals or are composed of particles that are composed of particles that are not well cemented may are not well cemented may __________________ when __________________ when struck by ______________ or struck by ______________ or __________________________.__________________________.

What is Frost Wedging?What is Frost Wedging?FROST WEDGING. There are FROST WEDGING. There are already some small cracks in already some small cracks in boulders, ______gets in the boulders, ______gets in the cracks, when that water ______ cracks, when that water ______ the rock is _______instead of the rock is _______instead of __________________. __________________.

The pictures in this article are from the The pictures in this article are from the summit ridge of Ypsilon Mountain, summit ridge of Ypsilon Mountain, perhaps one of the best spots in the park perhaps one of the best spots in the park to see the effects of frost wedging. You to see the effects of frost wedging. You can clearly see in these pictures how the can clearly see in these pictures how the rocks were split apart into plates -- a sure rocks were split apart into plates -- a sure sign of frost wedging at work. sign of frost wedging at work.

What is Salt Wedging?What is Salt Wedging?SALT WEDGING. When it ____ SALT WEDGING. When it ____

and __________________, it and __________________, it usually have ions and salts usually have ions and salts dissolved inside. dissolved inside.

The _____________________ and ______________. Slowly _____________________, those crystals act like a _________ and _______________________

A wooden post that soaked for many A wooden post that soaked for many years in a pool of brine in Owens Lake years in a pool of brine in Owens Lake (dry), eastern California. The grotesque (dry), eastern California. The grotesque swelling of the wood results from swelling of the wood results from deposition of salts in the wood.deposition of salts in the wood.

Ok, but what is Chemical Ok, but what is Chemical Weathering then?Weathering then?

________________________________________________________________________________________________________________________________________________

http://www.geography4kids.com/files/land_weathering.html

But how does this chemical But how does this chemical weathering make the changes?weathering make the changes?Through the process Through the process of…of…____________________________________

______________________________________________________

What do you mean by What do you mean by oxidationoxidation??

The process by which The process by which ____________________________________________________________________________________________________________________________________________________________________________________________________

When iron reacts with oxygen, When iron reacts with oxygen, reddish -brown   iron oxide is reddish -brown   iron oxide is formed. The iron-oxide crust formed. The iron-oxide crust crumbles easily and weakens the crumbles easily and weakens the rock. rock.

Oxidation ContinuedOxidation Continued________________________________________________________________________________________

Then what is hydrolysis?Then what is hydrolysis? HYDROLYSISHYDROLYSIS  is…   is…

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

For example, during hydrolysis, the For example, during hydrolysis, the feldspar in granite changes to clay feldspar in granite changes to clay mineral which crumbles easily, mineral which crumbles easily, weakening the rock and causing it to weakening the rock and causing it to break down.break down.

What is carbonization?What is carbonization?______________________________________________________________________

__________________________________________________________________________________________________________________________________________________________

This process weakens the rock This process weakens the rock thus thus ________________________________________________________________________________________________________________________________________________________________________