A video and a short multiple-choice quiz on the topic of aquatic ecosystems. It discusses the difference between freshwater and saltwater ecosystems, then explains what the three ecozones are in a marine ecosystem.

Students explore Earth's most important natural resource, water, and learn about how the planet's aquatic biomes thrive and support life.

[Free Registration/Login may be required to access all resource tools.] Aquatic biomes can be generally classified based on the amount of salt in the water. Freshwater biomes have less than 1% salt and are typical of ponds and lakes,...

[Free Registration/Login may be required to access all resource tools.] In this module, students will learn about the cycles of nature (water, carbon, nitrogen, and phosphorus) that support the flow of nutrient matter through an...

[Free Registration/Login may be required to access all resource tools.] Water pollutants can have an effect on both the ecology of ecosystems and on humans. As a result of water pollution, humans may not be able to use a waterway for...

In this WebQuest, you must pick a type of water habitat to create a new aquarium, choose three animals that can coexist in this habitat and design your own aquarium.