This package includes all the assessment material you need to assess students' knowledge of the key concepts and skills over freshwater resources, water cycle, water quality, and pollution. This package includes a study guide and answer key, as well as a geneal ed verison of a test and modified version, great for special ed and ESOL students. Optional student answer documents have been included to ease the burden of grading. These tests include modified true/false, multiple choice, completion and diagram questions.