Water is all around us; it’s the mighty oceans and Great Lakes, tiny vernal ponds and rain falling from the sky. It’s the thirst quenching liquid in your glass. Our planet is the only one we know of ...

The ACS is making educational resources available by topic to aid parents and teachers during this time of distance learning. Water is a simple molecule made up of two hydrogen atoms and one oxygen ...

Synthetic materials are made from natural resources. Synthetic materials are made by chemically changing the starting substances to create a material with different characteristics. Some examples of ...

This course provides a quantitative introduction to water resources engineering, where fluid mechanics, statistics, and computer modeling are applied to hydrologic and hydraulic design problems. For ...

Use our Power to Production Activity Guide (pdf) for more lesson plans. Learn more about our Power to Production field trip program at the Tsongas Industrial History Center. The Library of Congress ...

Greater New York City is the largest metropolitan area in the United States (U.S.) and meets the criterion for a megacity. Philadelphia is the fifth largest metropolitan area in the U.S. Both have ...