Mia's friends are fish-sitting while she is away on vacation. Zoe divulges to Sam that different animals need different habitats, and that there are both freshwater and saltwater ecosystems. Examples of the kinds of organisms found in...

Be water wise! Science scholars learn the water cycle on a global scale in part seven of a 13-installment series. The hands-on interactive allows them to explore Earth's water storage, types of precipitation, and the cycling of water...

In this identifying geographic terms and their definitions online interactive worksheet, students match the vocabulary words with their definitions. Students match 24 answers.

For this wetlands worksheet, students complete a 31 question multiple choice on-line interactive quiz about marshes and wetlands.

In this wetlands activity, students complete a 31 question multiple choice on-line interactive quiz about wetlands. Included are questions about plants, animals and geography.

In this water worksheet, students watch a video on water, read a passage, complete sentences, write vocabulary words, and write a paragraph. Students complete 5 activities total.

Compare the freshwater stickleback with its saltwater relative and trace the evolutionary changes of the fish. Includes a lecture by Dr. David Kingley, as well as an animation showing the evolution of the stickleback in an Alaskan lake.

An experiment to test what happens when ocean water hits a freshwater estuary. Each step is demonstrated with photographs and the difference between salinity and density is explained.