Soil Erosion Protection Methods by aau12608

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									Write your answer to question 11 in the space provided on page _ of your Student
Response Booklet.
5918 | OR | F:4A Q:11 Sect:A| Content:50 | Matrix | Artid:

                                                             Soil Erosion Protection Methods
11.        Soil erosion can cause problems during road construction, housing development, and
           farming.
           a. Propose two models that would demonstrate different ways to prevent soil erosion
                and explain how each model works.
           b. Describe a test to evaluate the effectiveness of one of your models.
                                   SPRING 1999 RELEASE ITEM
                                        Grade 11 Science


                      SAMPLE OPEN-RESPONSE QUESTION
How do students       The following is an example of an open-response question designed to provide an
provide evidence      opportunity for students to show what they know and can do in the area of science:
of what they
know and can do            Soil Erosion Protection Methods
in science?                Soil erosion can cause problems during road construction, housing development,
                           and farming.
                               a. Propose two models that would demonstrate different ways to prevent
                                  soil erosion and explain how each model works.
                               b. Describe a test to evaluate the effectiveness of one of your models.


                      SCIENCE CONTENT
What is the           The content of the open-response question “Soil Erosion Protection Methods” addresses
relationship of       the following Science Academic Expectations: “Students understand scientific ways of
the assessment to     thinking and working and use those methods to solve real-life problems” (2.1: Nature of
the curriculum?       Scientific Activity), and “Students use the concept of scale and scientific models to explain
                      the organization and functioning of living and non-living things and characteristics that
                      might be observed” (2.4: Models and Scale).
                      This question provides a way for students to show their understanding of several concepts
                      from the Core Content for Science Assessment. In addition to the general concept of scientific
                      inquiry (i.e., the methodology of scientific thinking and investigation), students are asked
                      to show their understanding of demonstrations and explanatory models in Earth Science
                      and of changes in Earth’s surface. In answering this question, students may draw upon
                      their experiences and knowledge of soil composition, soil erosion, and methods of
                      preventing erosion.




Soil Erosion Protection Methods
                                    SPRING 1999 RELEASE ITEM
                                         Grade 11 Science


                      PERFORMANCE EXPECTATIONS
How good is good      An appropriate student response should provide evidence of the student’s in-depth
enough?               understanding of how to design appropriately scaled demonstration models, and how to
                      test a model’s response to simulated erosion conditions.
                      For example, an appropriate response to this question would show that the student can
                              •   identify two different models that would demonstrate different ways to prevent
                                  soil erosion;
                              •   clearly explain how each model works; and
                              •   clearly describe a test that could be used to evaluate the effectiveness of one of
                                  the identified models (i.e., describe a test with enough detail so that the validity
                                  of the conclusions about the effectiveness of the model could be determined).
                      Successful student work should provide convincing evidence that the student can use
                      scientific content and inquiry skills to address the relevant issue(s), although the response
                      may not address all details and may contain some minor flaws.


                      APPLICATIONS
How is this           This question addresses the fundamental aspects of scientific inquiry, as well as of scale
relevant?             modeling. By successfully answering this question, students demonstrate an ability to
                      propose practical models and valid tests for the evaluation of those models. Students who
                      demonstrate this ability are better able to use the techniques of scientific inquiry to investigate
                      situations and to propose and test solutions to problems encountered in everyday life. This
                      ability will also help students to recognize the importance and practicality of applying
                      scientific methodology to make inferences about the characteristics of systems where full-
                      scale experiments cannot be conducted.




Soil Erosion Protection Methods

								
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