3= Response provides a good understanding of the effects of lower pH on the entire ecosystem and that animals upon which the brook trout feed have been eliminated from the lake. Attempts to use information from table and observations to support answer.

2= Response demonstrates little understanding of the affects of the lower pH on the entire ecosystem. States that the acid pH is responsible for the decline in the trout population. Does not use information from table and observations to support answer.

1= Response demonstrates a very limited understanding of the factors that would cause the fish population to decline. Explains the population change is due to the pollution of Lake Wilmar. Does not use information from table and observations to support answer.

0= Rewrites question. Response is off-topic. No response or inappropriate writing or drawing.

2= Response demonstrates partial understanding of what additional experimental testing needs to be done. States that only one variable needs to be tested or mentions additional tests that do not verify the information on the chart. Gives a weak explanation of how it verifies the data on the wildlife chart.

1= Response demonstrates extremely limited understanding of what additional experimentation needs to be done. States only one variable and gives no explanation of how it verifies the wildlife chart.

0= Rewrites the question. Response is off-topic. No response or inappropriate writing or drawing.

3= Adequate understanding of the affect of pH on the survival of the animal populations. Discusses the three water sources (spillway, lake, and creek water) and the pH values of each.

2= Limited understanding of the affect of pH on the survival of the animal populations. Includes minor misconceptions.

1= Demonstrates extremely limited understanding of the affect of pH on the survival of animal populations. Includes major misconceptions.

0= Rewrites the question. Response is off-topic. No response or inappropriate writing or drawing.

3= Graphs present the data accurately. The shape of the curve correctly represents the time and temperature relationship. The axes and the curves are labeled correctly.

2= The data points are correctly plotted on the graphs as drawn. Axes may be reversed. The shape of the curve may not represent the temperature and time relationship.

1= The data points are not plotted correctly. Axes are not labeled with correct measurements. The shape of the curve does not represent the temperature and time relationship. Two lines, which do not represent the time and temperature relationship, are drawn without plotting points.

0= Rewrites the question. Response is off-topic. No response or inappropriate writing or drawing.

3= Response demonstrates partial understanding of the scientific concepts related to the heat storage ability of different substances. May include a misconception. May discuss observations from previous experiment.

2= Response demonstrates limited understanding of the scientific concepts related to the heat storage ability of different substances. Includes many misconceptions. States that both the water and the rock hold the same amount of energy because they are at the same temperature. Attempts to support this with logical reasoning, but rationale may be vague or unclear.

1= Response demonstrates extremely limited understanding of the scientific concepts related to the heat storage ability of different substances. Major misconceptions are evident. If rationale is present, it is vague and unclear.

0= Rewrites the question. Response is off-topic. No response or inappropriate writing or drawing.

3= Response shows adequate understanding of the effects of bodies of water on the local weather. May attempt to discuss the energy transfer of the stored energy in the lake to the surrounding land and air. May contain a misconception.

2= Response shows little understanding of the effects of bodies of water on the local weather. Discussion includes misconceptions. May stress the change in altitude as the major cause of the changes throughout the year.

1= Response shows extremely limited understanding of the effect of bodies of water on the local weather. Discussion if present, includes major misconceptions.

0= Rewrites the question. Response is off-topic. No response or inappropriate writing or drawing.

3= Adequate description of what occurred when the limestone is put in the spillway water. Experimental design lacks detail. A misconception (identity of limestone) may be present.

2= Limited description of what happened to the limestone. Flaws in experimental design. Misconceptions are present.

1= Extremely limited description of what happened to the limestone. Flaws in experimental design. Major misconceptions are present.

0= Rewrites question. Response is off-topic. No response or inappropriate writing or drawing.

2= Partially adequate response. Answer includes limited discussion of reaction rates in higher concentration of acids. May have a minor misconception (not knowing identity of pollutant in the spillway water.)

1= Inadequate response. Answer is very brief and gives little explanation of the reaction rates in different concentrations. Mainly "filler" with one or more major misconceptions.

0= Rewrites question. Response is off-topic. No response or inappropriate writing or drawing.

3= Response demonstrates adequate understanding of the concept of acid rain or air pollutants, and the effects that they would have on a marble statue in the area. A minor misconception may be cited in the discussion.

2= Response demonstrates partially adequate understanding of the concept of acid rain or air pollutants and the effects that they would have on a marble statue in the area. Several misconceptions are found in the discussion.

1= Response demonstrates an extremely limited understanding of the concept of acid rain or air pollutants and the effects that they would have on the marble statue. If discussion is present, it may attempt to relate the erosion of the statue to the spillway water. Major misconceptions.

0= Rewrites question. Response is off-topic. No response or inappropriate writing or drawing.