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Chemistry is the study of matter and energy and the interactions between them. Get facts for the elements in the periodic table. Find chemistry demonstrations and experiments and science fair projects. Get chemistry homework help with worked example ...

A new spin on the perceptions, procedures, and principles of flight. 20 chapters, over 200 illustrations.

Home page of the USGS Georgia Water Science Center.

WikiAnswers: Questions and Answers from the Community

YouTube is a place to discover, watch, upload and share videos.

Infoplease.com, a free, authoritative, and respected reference for Internet users, provides a comprehensive encyclopedia, almanac, atlas, dictionary, and thesaurus. Infoplease.com contains facts on all subjects including sports, entertainment, techno...

Jim

HowStuffWorks Science has explanations and colorful illustrations related to earth science, life science, and other wonders of the physical world.

Lenntech designs, builds and installs a wide range of odour treatment, water purification and air filtration products using UV, ozone, Ecosorb, drum filtration. Also cooling towers.

How to change what others think, believe, feel and do is at the core of many professions. Here are the inner secrets of persuasion and changing other people.

Go ahead: try to stump it. RhymeBrain works for the toughest words, where other sites fail.