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Heavy Metals December 17th and 18th, 2014 Jessica Wilhelm Grade Level Seventh and Eighth Subject/Topic Environmental Science and Policy School Lin-Wood Middle, NH Next Generation Science Standards NGSS Standards: MS.Human Impacts Link: http://www.nextgenscience.org/msess-hi-human-impacts Overview Metals leached into the environmental from both natural and anthropogenic sources have an effect on human and ecological health. This lesson connects metallic chemistry with hydrologic principles to gain perspectives on contaminant source, transport, and reaction. Lesson Objectives Through this lesson students will develop an understanding of the hydrologic measurement for charged elements: specific electrical conductance, in addition to basic water chemistry, and water quality. Activities • • • Specific electrical conductivity measurements were taken for tap water, stream water, and Gatorade. Elemental bracelets were designed by the students with the number of beads based on the protons, neutrons, and electrons of a metal from the periodic table. Conductivity soup made from apples, oranges, and pears emulated the ions in freshwater ecosystems. Support Materials/Equipment (Worksheets, handouts, websites, etc.) List • Conductivity probe, tap and stream water, and Gatorade • Hemp twine and beads • Soup pot with ladle and fruit: red apples, green apples, and oranges Assessment Strategies Students answered a different question written on a soccer ball prior to the lesson, and at the end of the lesson, to evaluate overall class improvement through diagnostic evaluation technique. For more information, please contact: Doug Earick, [email protected] Link to website: https://www.plymouth.edu/center-‐for-‐the environment/education-‐outreach/
