Before you submit an error, please consult our Video Help page. Steve Trash Science is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android ...

Students will learn how to categorize matter as either pure substances or mixtures. Students will apply tests, based on physical properties of matter samples, to determine whether a mixture is ...

Physical chemists are focused on understanding the physical properties of atoms and molecules, the way chemical reactions work, and what these properties reveal. Their discoveries are based on ...

Visit NAP.edu/10766 to get more information about this book, to buy it in print, or to download it as a free PDF. Condensed-matter and materials physics is the branch of physics that studies the ...

Describing natural phenomena with geometric language is one of the most important achievements of modern physics. In the context of general relativity, Einstein treats spacetime as a dynamic geometric ...