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| | The Material World |
 | | Photonics is a term which refers to the technologies, techniques, devices, instruments and systems that generate, modify or utilize electromagnetic energy in the wavelength range from x-ray to far infrared. |
 | | Chevron Corporation, one of the world's largest integrated petroleum companies, is involved in every aspect of the industry, from exploration and production to transportation, refining and retail marketing, as well as chemicals manufacturing and sales. |
 | | The description should point out the location of the material, the name, the composition, the chemical formula if applicable, the nature, the beneficial, and the harmful effects. |
| www.science.uwaterloo.ca /~cchieh/cact/applychem/matworld.html (934 words) |
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