They should look for any patterns that may occur and how they may affect events in the environment. Students should be able to describe any changes that occur during the testing. For an extension have students measure the pH levels of common products such as, lemon juice, vinegar, apple juice, tomato juice, milk, and pure water. Have students record the pH levels in their journal. After the research has been conducted, have the students log on to the USGS site for additional background information.
Students can observe maps, graphs, and pH charts.
Students can download actual data and plot the average acidity for several selected cities and communities across the United States. For extension have students research the harmful effects acid rain has on our environment. The following learning and performance objectives correlate to this activity, and support Ohio proficiency test outcomes . You may use them to tailor this activity to your local curricular objectives and goals. Strand I Nature of Science 4.