Other
Adopt a Pond Wetland Curriculum Resource
The Adopt-A-Pond Program was created by the Toronto Zoo for teachers looking for a guide to wetland issues and resources.
Science4Fun
Science4 Fun: Water Cycle
What is the water cycle? Learn how the water moves to the atmosphere, how water moves across the land, the importance of the water cycle, and the effects of pollution.
HotChalk
Hot Chalk: Lesson Plans Page: Aquatic Wildlife and Pollution
This lesson plan is designed to teach young children about healthy and hazardous marine and freshwater environments and be able to describe the effects of the pollution of plastics on wildlife.
US Navy
Onr: Saltwater vs. Freshwater, Which Is Denser?
This site contains an experiment on how to find out which has more density -- freshwater or saltwater.