Royal Society of Chemistry
Royal Society of Chemistry: Gridlocks: Level 2
A collection of grid puzzles that cover a wide variety of topics in intermediate high school chemistry. These are excellent for topic review and reinforcement. The puzzles can be played online and also downloaded as worksheets. Answers...
Encyclopedia of Earth
Encyclopedia of Earth: Physics & Chemistry: Petrochemicals
Explains what petrochemicals are, the main hydrocarbon feedstocks that form the basis of petrochemical industries, sources, uses, and products made from petrochemicals. (Published: September 25, 2011)