This site from the Astronomy Department of Cornell University provides brief introduction to both solar and lunar eclipses. Links are provided for pictures and charts of the eclipses, and this is a good site to check out on the subject.

Learn how Greek mathematician Eratosthenes used geometry to estimate the circumference of the Earth.

Definintions for pulsars, millisecond pulsars, the evolution of pulsars, neutron stars and "Black Widows." Features related links.

At this site from the Astronomy Department of Cornell University, Kepler's three laws of planetary motion are stated. There are brief explanations of each, along with links to additional information on related subjects.

The complex sequence of events in a supernova explosion are explained and illustrated.

This site from Cornell University provides great information on the different phases of the moon. As the Moon moves in its orbit around the Sun, our view of the side illuminated by the Sun changes. Furthermore, the rising and setting times of the Moon change with the moon phase in a predictable manner. This site provides good diagrams of the cause of the phases and the changes in the rising and setting times.

Students incorporate their knowledge of civil engineering and physics principles as they design and build a bridge within certain parameters while choosing their own materials.

Here are thirteen questions with complete explanations to see how much you know about composting.

This clickable web page is like an outline that comprehensively covers the science of composting. Each link takes you to another section of notes.

This article describes the advantages and opportunities that can be utilized by composting in schools. Biology, chemistry, and physics can all be explored with simple schoolyard composting.

A brief overview of the term "antitrust", with a specific emphasis on the Sherman Antitrust Act which passed in 1890.

This resource gives a table of the Articles and Amendments of the United States Constitution.

This site from the Cornell University Law School provides an overview of constitutional law as it applies in the United States, with links to additional information.

This Cornell Law School site describes the consumer protection acts that protect creditors, Uniform Credit Consumer Code and Consumer Protection Act.

A collection of resources for understanding income tax law, including its roots in the Constitution, federal and state statutes and regulations, judicial decisions, and links to the websites of government and tax agencies.

This site from the Cornell University School of Law provides a clear overview of Insurance Law. A great place to get the basics with links to more in depth resources and examples.

This is a legal definition of the term prima facie that includes an example.

The resource provides an overview of secured credit obligations. Article 9 of the Uniform Commercial Code is also described.