Damaged septic tank Factory Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Teaching Transparency Industrial waste Contaminated well Well producing pure water Coarse sandy gravel Groundwater Pollution Clay Gravel Clay 27 Fine sandy gravel Clay Sand Water table MASTER TEACHING TRANSPARENCY Use with Chapter 10 Section 10.3 Transparency Master 27 Earth Science: Geology, the Environment, and the Universe 89 Name WORKSHEET Class 27 Date TEACHING TRANSPARENCY Groundwater Pollution Use with Chapter 10 Section 10.3 1. Is the gravel aquifer polluted, and if so, what is the source of the pollution? 2. Is the fine, sandy gravel aquifer polluted, and if so, what is the source of the pollution? 3. Is pollution from the factory likely to affect the gravel aquifer? Explain your answer. 4. To which aquifer should the factory owners dig a well in order to obtain clean well water? 5. Why is one of the wells at the house on the right able to produce pure water while Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. the other well is contaminated? 6. Explain why the coarse, sandy, gravel aquifer is or is not polluted. 7. Why might the pure-water well prove to be an unreliable water source in the future? 90 Transparency Worksheet 27 Earth Science: Geology, the Environment, and the Universe Teaching Transparency