Students simulate Joseph Priestley's experiments using a bell jar. They demonstrate that oxygen is necessary for fire and animals but that given time, plants can create oxygen, allowing fires to burn and animals to breathe.

A wealth of information about Unitarian Universalism and resources for UU congregations are housed at this site. The history of the religion, its roots in the Judeo-Christian tradition, its principles, purposes, and bylaws, and answers...

A detailed explanation of the Phlogiston Theory, including reaction equations. Includes several formulas, examples, and detailed information.