Geog. 12, Answers to Friday 5: Oct. 9th

 1.  What are the four ways that a river erodes a landscape?

Erosion happens via Abrasion, Attrition, Hydraulic Action & Solution

2.  Define/explain one of these erosional forces.

Abrasion:  causes river bed to become deeper through the action of scraping or wearing away

Attrition:  stones and rocks knock together breaking into smaller particles so the bedload is breaking itself apart or by hitting the bed

Hydraulic Action:  the ability of moving water to dislodge and transport rock particles, breaking up the banks

Solution:  Water dissolved soluble materials

3.  List two ways humans try to manage river flow?

Dams, reservoirs, levees, dykes, hydroelectric power stations, dredging

4.  List two depositional landforms a river creates.

Alluvial Fan, delta, braided channel, oxbow lake, flood plain, sand/point bar, natural levee

5.  What are the two ends of a river called?

source- the start

mouth - end

Geography 12: Oct. 9

 Today in Geography 12 we wrote a Friday 5.  From here the class got a view of what their current mark is in Geography these are posted on the board.  They are missing your connections models on the spheres, today's Friday 5 and your test corrections.  Hopefully another update next week.

There was some time to ensure each group member had all the data from the river study to date.  Hopefully we are heading to the Pass on Wednesday to gather the last of the data for the river study.

From here we worked on the River Systems Review sheet and watched these two videos:

https://www.youtube.com/watch?v=8EIoBao-UvI

https://www.youtube.com/watch?v=3YdEkegvJCQ

-Test has been moved to either Wed or Fri next week.  (14/16th  depending on if we are at the Pass or not).

-On Tuesday I will review old vs young rivers and drainage patterns which should finish up the section.

Have a great long weekend!

Geography 12 - Review sheet for River systems test

Test date:  October 10, Friday

Earth Matters pp.116-118, 185-193 

Be ready to define and give an example of some of the following vocabulary:

tributary                          drainage patterns                  flood plain                waterfall
erosion                            undercutting                         meander                    v-shaped valley
levee                               delta                                      estuary                     gorges/canyons
oxbow lake                     alluvial fan                            flow velocity            potholes/watermills
solution                           suspension                            traction                      dredging             
saltation                          sediment transport                hydraulic action        watershed
abrasion                          attrition                                dam.             mouth.     source

***Be able to differentiate between erosional and depositional features in a river system.

Know the drainage patterns! I didn't add to the vocab...but know them!

Know the stages of river development and what sort of evidence there is to support what stage of development a

river is in.

Be able to describe and draw a diagram showing the processes of erosion.

Be ready to label diagrams of river systems.

Know the different components of a river system.

Be able to associate the features of a river system to what we have seen in our field work.

Understand the human impacts on river systems

Geography 12: Oct. 5 & 6

 After some catching up from me being away here is where we are at:

IMPORTANT UPCOMING Dates:

Wed Oct. 7 - field work on Illecillewaet River.  

Tuesday Oct. 13:  test River Systems

Wed. Oct. 14:  Field work:  Rogers Pass (back at lunch)

Monday:  we started our connections model presentations, talked about rivers as agents of gradation.  We talked about erosion and transportation.

Erosion happens via Abrasion, Attrition, Hydraulic Action & Solution

Abrasion:  causes river bed to become deeper through the action of scraping or wearing away

Attrition:  stones and rocks knock together breaking into smaller particles so the bedload is breaking itself apart or by hitting the bed

Hydraulic Action:  the ability of moving water to dislodge and transport rock particles, breaking up the banks

Solution:  Water dissolved soluble materials

 

On Tuesday we went over and corrected our glaciation tests.  Did some review of the above and talked about River Deposition.  We also continued on with presentations of connections models.

Geog 12: Glaciation Review sheet

 Test/Large quiz is on Friday.  

Earth Matters Text book pages:  102-103, 132-139

There will be two diagrams to label.  There will be some short answer questions.  There may be a T/F section where you have to back up your answer.

Understand the terminology and how to apply it.

Understand how glaciation is an agent of gradation.

Be able to describe why a crevasse forms.

Be able to differentiate between erosional and depositional landforms.

Know the following terminology:

Glaciation:

U & V shaped valley Glacier Hanging glacier/valley Moraine (terminal, lateral etc) Isostasy              drumlins Abrasion             erratics Finger lakes    outwash plane Drumlins             esker Kames               icefall Kettles               cirque Arete                  col Horn                   skerries Alpine glaciation Continental glaciation Gradation Fjord

Answers to Friday 5: September 18

These photos go with number 4.

 1.  Differentiate between the two types of glaciers.

-Alpine and Continental

Alpine glaciers begin high up in the mountains in bowl-shaped hollows called cirques. As the glacier grows, the ice slowly flows out of the cirque and into a valley. Several cirque glaciers can join together to form a single valley glacier.  Continental Glaciers cover all or parts of continents like Greenland and Antarctica.  They are continuous ice flows, small ones are called ice fields, large ones are known as ice sheets.

2.  Provide three ways glaciers contributions can be indicators of global warming (besides visual shrinking).

-increase in sea level through melting ice

-change in ocean ecosystems and ocean currents because of the increase in fresh water in the ocean

-decrease of salt in ocean can change the Gulf Stream changing the weather on land

-decrease of fresh water available for plants and animals on land

3.  List Erosional and Depositional features formed from glaciation.

4.  Explain with a diagram how crevasses are formed:

(see above pictures)

A crevasse is a deep crack that forms in a glacier. Crevasses form as a result of the movement and resulting stress associated with the movement of the ice.  

5.  Define Firn or Névé:

A Névé is a young, granular type of snow which has been partially melted, refrozen and compacted, yet precedes the form of ice.  It is associated with glacier formation.

A Firn is a type of snow that has been left over from past seasons and has been recrystallized into a substance denser than névé.

Geography 12, week of Sept. 14th

 Monday - we did some review including going over the Friday 5.  Students then headed to the library to get their text books:  Earth Matters.  From here we discussed last weeks video focussing on the two following questions:  What positive resources do we get from glaciers?  How are glaciers indicators of  global warming.  We answered these using specific examples from the video.  We then moved onto working on our glaciation sheet.  Finally we watched this video and worked on our glaciation sheets.

https://www.youtube.com/watch?v=loI584OFVpE

Tuesday- some brief review and then discussion around field trip.  We watched these videos, talked about the Laurentide Ice sheet and took some notes (see slides below), working on finishing the glacieation sheet.   https://www.youtube.com/watch?v=wbsURVgoRD0

https://www.youtube.com/watch?v=5sA1RmWyNB8

https://www.youtube.com/watch?v=OvRXWbTZ8YY

https://www.youtube.com/watch?v=NH-vnKR6A7A&t=2s

Wednesday:  Field Trip to Rogers Pass!  Assignment if you missed it ( pick up in library or from Ms. Mohn in the office).