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Ocean Bottom Profile
Rubric

Grade 5-8 Performance Task
Contributed by: New York State Education Department (NYSED)
NYS Alternative Assessment in Science Project (1996)

Ocean Bottom - Scoring Rubric

Maximum Score - 17 Points


Task 1a & b
2 points total

 

Standard: The student will correctly identify the regions based on the profile.

Criteria:

  • 1a. Allow 1 point for the mid ocean ridge.
  • 1b. Allow 1 point for continental shelf.

Task 2a & b
2 points total

Standard: The student correctly reads ocean depth based on the profile.

Criteria:

  • 2a. Allow 1 point for 4800m +/- 100m.
  • 2b. Allow 1 point for 140m +/- 100m.

Task 3 - Depth changes - Data table
5 points total

Standard: The student will determine depth change at different locations on the profile as shown below.

Criteria:

  • Allow 1 point for each correct depth change

        depth change (m)
    Continental slope
    =
    1200m +/- 100m
    Continental rise
    =
    300m +/- 100m
    Abyssal plain
    =
    20m +/- 100m

 

  • 3a Allow 1 point for continental slope
  • 3b Allow 1 point for abyssal plain

Task 4 - Vertical exaggeration
2 points total

Standard: The student will accurately determine or explain the vertical exaggeration in the profile.

Criteria:

  • Allow 1 point for proper substitution of values (including unit changes)
  • Allow 1 point for calculation of VE
    Note: Based on student data
    OR
  • Allow 2 points if there is a clear explanation of the difference between both the horizontal and vertical axes of figure 1.
  • Allow 1 point if the explanation shows a depth exaggeration but lacks a numerical explanation.

Task 5 - Description
2 points total

Standard: The student will apply the knowledge of scale to the profile.

Criteria:

  • Allow 2 points for a correct statement implying the profile shows exaggerated depth. Answer should be in complete sentences.
  • Allow 1 point for a correct statement, but not in complete sentences.
  • Allow 0 points for an incorrect statement even if it is in complete sentences.

(We want students to know it's flatter than this picture.)


Task 6 - Application
4 points total

Standard: The student will apply theories of ocean bottom features related to continental drift.

Criteria:

  • 6a. Allow 1 point for diagram or explanation showing accurate representation of sea floor spreading.
    Note: Refer to double jeopardy
  • 6b. Allow 1 point for a correct statement identifying igneous, volcanic rock or Basalt.
  • 6c. Allow 3 points for a statement relating vents to sea floor spreading or heat flow. Answer should be in complete sentences.
  • Allow 0 points for an incorrect statement even if it is in complete sentences.

 
Highest possible score - 17 points

 


Ocean Bottom Profile - Scoring Form

Student ID ___________

Male or Female (circle one)

Circle the student's score for each question. Add the points for each question and write the total score at the bottom of the scoring form.

1. Identified regions      
a. Widest - mid ocean ridge
0
1
 
b. Narrowest - continental shelf
0
1
 
2. Depths      
a. 15 degrees W - 4800m +/- 100m
0
1
 
b. Shelf edge - 140m +/- 100m
0
1
 
3. Depth change      
Continental slope - 1200m +/- 100m
0
1
 
Continental rise - 300m +/- 110m
0
1
 
Abyssal plain - 0m +/- 100m
0
1
 
a. Steepest - continental slope
0
1
 
b. Level - abyssal plain
0
1
 
4. Vertical exaggeration (VE)      
Substitution
0
1
 
Calculation
0
1
 

OR

     
Clear explanation
0
1
2
5. Description
0
1
2
6. Application      
a. Crustal movement
0
1
 
b. Bedrock
0
1
 
c. Vents
0
1
2

Total Score __________

Total possible score - 17 points

 


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