This web page, created by David P. Stern, describes magnetic substorms and storms, their properties, and their relations to charged particle flow and auroras. It includes descriptions of the magnetic field changes in the...

This web site is an online exhibit about Marie Curie, the discoverer of the radioactive elements polonium and radium and the first person to win two Nobel prizes. The exhibit provides an interactive account of Marie...

This resource, created by Michael W. Davidson of Molecular Expressions, is a series of "Powers of Ten" is sequentially displayed, beginning with a square covering 10^23 m on a side and progressing through 10^-16 m on a...

For information on thermodynamic data for over 5,000 chemical compounds and on ion-energetics data for over 10,000 chemical compounds, NIST's Chemistry WebBook is available for searching. Compounds can be searched by...

This lesson provides an overview of basic atomic structure and the concept of radioactive decay. Topics include the particles that make up an atom, binding forces, and the concept of isotopes. There is also discussion of...