In this fish in the Hudson worksheet, students read a brief excerpt about what types of fish can be found in the Hudson River in New York. They identify which fish are caught in greatest numbers and those caught in the most places....

Studying sea ice in the Arctic region is very difficult. Read how scientists are using an innovative technique of freezing seawater in a pool to study sea ice.

This U.S. Geological Survey website explains the desalinization method used by some communities to change sea water into drinking water. Click Home to access the site in Spanish.