This colourful and engaging 72+ page unit includes everything that you will need to teach your students about water systems on Earth. This unit covers water, quality of water, glaciers, polar ice caps, environmental effects, pollution, water sheds, and water management.Specific Lessons Include:• Identifying and describing watersheds• Explaining how water is managed • Describing how pollution gets into water• Describing local and national water issues• Analyse the factors that affect global warmi