Big Ideas | Page 82

SCIENCE AND 82 ENGINEERING PRACTICES SAMPLE STUDENT ENGAGEMENT, GRADES 9–12 Analyzing and Interpreting Data Create a short film, slide show, or other presentation that compares two or more different sources of electricity in terms of their environmental, economic, and social benefits and costs. CROSSCUTTING CONCEPTS SAMPLE STUDENT ENGAGEMENT, GRADES 9–12 Patterns Devise and test a methodology to clean and purify a sample of contaminated water, which may contain a combination of various materials such as food coloring, grass clippings, dental floss, “flushable” wipes, pharmaceuticals, mineral oil, salt, pepper, and small pieces of newspaper. Identify the challenges of treating wastewater on a citywide scale. Cause and Effect Examine the potential influence of climate change on water and power resources (see the U.S. Environmental Protection Agency website’s “Climate Impacts on Water Resources” at www3.epa.gov/ climatechange/impacts/water.html and “Climate Impacts on Energy” at www3.epa.gov/climatechange/impacts/energy.html). Choose one cause–effect relationship, and create an electronic or threedimensional model to describe and explain the connection. BIG IDEAS | Grades 9–12 | SAN FRANCISCO PUBLIC UTILITIES COMMISSION