For the 10th anniversary of National Chemistry Week, the local section of the American Chemical Society (ACS) will hold its annual series of demonstrations and hands-on activities at Pyramid Mall Saturday, Nov. 1, from 10 a.m. to 5 p.m. The activities will include information on such topics as how plastic bottles are recycled into carpet, how acids and bases are used in everyday life, the "supercool" world of liquid nitrogen, a secret of the Alaskan pipeline, and much more. There also will be free "giveaways" for people of all ages.