Gradation - PowerPoint Presentation

Slide1

GradationSlide2

Slide3

Outcome C Weathering

http://www.youtube.com/watch?v=lyysL02ZvQ8

Physical Weathering-

Chemical Weathering-Slide4

Physical Weathering-Outcome C-1

Frost ShatterSlide5
Slide6
Slide7
Slide8
Slide9

Formative Task 1

Read Page 38..

Draw a labelled illustration of each type of Physical Weathering.Slide10

Outcome C-2-Chemical Weathering

Involves the decay of rock so that the chemical composition of the rock is changed...Slide11

Processes..

Solution--- As rain droplets pass through the atmosphere they absorb CO2 and form a mild acid called Carbonic acid..

This acid rain will dissolve rock like limestone...Slide12

SolutionSlide13

Hydrolysis

Carbonic acid works on minerals called silicates.

Ions of water replace ions of silicate and the dissolved minerals are carried away in the water..

Eg. Water-- Through coffee grounds..Slide14

Oxidation

Oxygen dissoved in water can change iron into iron oxide. As water comes in contact with the iron oxide, it disolves it and carries it away... A red rust stain on rocks is an indication that oxidation is taking place..Slide15

vIDEO-- Chemical Weathering..

http://www.youtube.com/watch?v=P8oWj3PVK9ESlide16

Weathering Vs. Erosion

Remember that weathering is the breakup of rock...

Erosion means both breakup and transportation..Slide17

Formative Task 1

Draw out an label examples of each in your notebook..

Write out the steps and colour as well...Slide18

Identify and Describe Process

Slide19
Slide20
Slide21
Slide22
Slide23
Slide24
Slide25
Slide26

Outcome C-3-

Slide27

Causes of Mass Wasting..

Natural Causes:

1.Adding Water-expands soil and reduces stability.

2. Freeze/thaw in winter reduces soil stability..Human Cause1. Logging- Destabalizes slopes.

2.UrbanizationSlide28

Solutions:

From page 40(Geo 12 workkbook)identify 8 techniques used to stabalize slopes so that Mass Wasting does not occur...Slide29

Types and Processes of Mass Wasting

From Pg 41 (geo 12 Workbook)

Identify and describe the process for each of the seven types of Mass Wasting...

Use a diagram to demonstrate your understanding of each...Slide30

Rubric for Diagram/Process Exp..

4- Includes detailed- 7 labelled drawings, includes at least a 5 step detailed process for each.

3-Includes detailed at least 5 labelled drawing, includes at least a 5 step detailed process

2-Includes a detailed of 4 labelled drawing, includes at least a 4 step detailed process

1-Includes detailed all 2labelled drawing, includes at least a 5 step detailed processSlide31

Outcome C Identify and describe processes associated with.....

running water (e.g., stages of fluvial development, methods

of sediment transport, abrasion, hydraulic action, vertical

erosion, lateral erosion, headward erosion)– ground water (e.g., solution)

– glaciation (e.g., plucking, abrasion)

– wind (e.g., deflation, abrasion)

– waves (e.g., longshore drift, abrasioSlide32

i

i

dentify the erosional and depositional features associated with

– running water (e.g., meander, oxbow lake, levee, flood plain, delta, drainage pattern, alluvial fan, playa)– ground water and Karst topography (e.g., sink hole,

stalactite, stalagmite, artesian well, aquifer)

– glaciation (e.g., cirque, arête, horn, truncated spur, hanging

valley, roche moutonnée, crag and tail, drumlin, kettle lake,

moraine, tarn, esker)

– wind (e.g., barchan, loess, mesa, butte, hamada)

– waves (e.g., headland, stack, spit, bar, tombolo)Slide33

Outcome C-4 Identify/Describe Drainage Basins

Using Googe Earth Find the following Locations and Identify the type of Drainage Patterns

Mt Rainier

Bella Colla B.C- river that flows beside the town.Fayettville North CarolinaSlide34

Dendritic PatternSlide35

Radial PatternSlide36

Trellis PatternSlide37

Outcome C 5- Identify Stages/Describe River Development Outcome C5Slide38

YouthfulSlide39

MatureSlide40

Old Age RiverSlide41

River Stages- Identify-Google Earth

Go to Mount Robson Visitor Centre- Find Picture nearby of Fraser River Headwaters..

Go to Mission B.C. find the Fraser River identify the river stage.

Go to Hells Gate BC- Identify the River StageFind at least 3 other rivers and identify the stage they are at...Slide42

C-6 Identify/Describe 4 Erosional Processes of Rivers C-6

Slide43

C7.Identify/Describe Erosional/Transportation

Slide44

Google Earth Tours.

You will create a google earth tour:

You will need to identify the features and processes forming the featues of one of the following areas:

1. Pg 44- 46-Upland/Lowland Rivers Eg. Fraser2.Pg. 49- 54- Alpine/Cont. Glaciation Eg Mount Robson. (Berg Lake)

3. Pg. 54-57 Coastal Landforms (Eg. Oregon Coast)Slide45

Google Earth Tours

4. Pg. 58-60- Groundwater--

5. Pg. 60-64 -Desert Landscapes..Slide46

C-8 identify/Describe Formation of Upland/Lowland River Features- C8

Upland

Process- Vertical Erosion dominates as gradients are steep.

Features: Water Falls, Gorges,Canyons, Boulders, Potholes,.Slide47

Lowland Features

Process-river has reached an elevation close to sea level. Energy used is lateral not vertical.

Features- Flood plains, meanders,undercuts,point bars, slip off slope,levees,dikes, oxbow lakes, river terraces,braided channels, river deltas.(arcuate delta,birds foot delta,and estuarine delta..Slide48

C 9- Identify Features and Formation Process of Alpine Glaciers

Process- Formation

Accumulation, abalation,formation

Erosion Actions(Processes)Plucking,Abrasion,Deposition,Till and OutwashSlide49

C-9 Continued.

Identify Erosional Feature and Describe Process

Cirque,Tarn, Arete,Col,Horn,Striations,Ground Moraine,Lateral Moraine,Medial Moraine,Termianl Moraine, Pro Glacial Lake,Snout, Recessional Moraine, Esker, Truncated Spurs, Hanging Valleys, Crevasses, Icefall, Glacial Lakes,Slide50

C-10 Identify Coastal Landforms and Formation Process

Erosional Actions- Describe

Waves, Wave Action, Wave Refraction,

Coastal Erosion: DescribeCorrosion,Corrasion,Attrition, Hydraulic Action, Undercutting,swash,backwash,longshore drift.

Identify Features and Describe Formation

of:

caves,bay, headlands,tunnel,arch stacks, Slide51

C-10 Coastland Forms

wave-cut platforms, spits, tombolos groyens, estuaries,rias,fiords.Slide52

C11- GroundWater/Karst Landscapes

Covered in ClassSlide53

C 12- Identify Wind/Desert Features and Formation Processes

Factors causing Desert Formation:

Latitude,Mountains,Currents,Ocean Influence.

Wind Erosion:Suspension,Saltation,Deflation,

Features:Identify/Describe Formation

Toadstools,blowouts,oases,aquiferSlide54

C-12 Continued

Water Erosion- Identify /Describe

Water Erosion Feature

-Alluvial Fan, bajjadas,wadis, playa lakes,canyons,Other Features: Identify and Describe..Dunes, leeward, slip face, transverse dune,barchan dune,parabolic dune,longitudinal dune, plateaus, mesa, buttes, hamadas,bolson.Slide55

Rubric For Google Earth Tour

1. You must identify and describe the formation process for each feature you demonstrate on google earth...

For example if you are Marking- Terminal Moraine for an Alpine Glacier- You must correctly identify it as such and then describe in detail the process for its formation. Most of the this information is found in your two textbooks...Slide56

Rubric

4. Formation description is extremely detailed and includes all possible steps required for this feature and your project includes all features mentioned. All features are correctly identified.

3. Formation description is detailed and includes most steps required for the formation of this feature. Your project includes at least