Friday Mar 27 2009 comments Lincoln High School Science Expo By: Karina Williams, Gold Country Media -A +A Karina WilliamsLincoln High School senior, Kelly Richardson explains about centrifugal force as she rolls on cotton candy for Lincoln Crossings third-grader, Sam Bains, right, and Carlin C. Coppin second-grader Isaiah Griffin. Karina WilliamsLincoln High School sophomore, Evan Rendes, explains how a roller coaster works to Creekside Oaks third-graders, Zachary Eutsey, left, and Dawson Nichols. Karina WilliamsCarlin C. Coppin third-grader, Richard Guzman said jumping on the water mixed with corn starch felt ?soft?. The exhibit was similar to quicksand, if a person applies pressure they stay on top, if they are still applying little pressure they will sink to the bottom. Karina WilliamsLincoln High School sophomores, Cassy Jones and Carlos Delafuente shoot off water rockets during the school's Science Expo. Karina WilliamsLincoln High School sophomore, Carlos Delafuente shoots off water rockets during the school's Science Expo. Karina WilliamsLincoln High School sophomores, Jordan Medina, right, and Daniel Milligan, left, explain their pressure exhibit to Lincoln Crossing third-graders, Chris Rodriquez, left, and Jay Townsend, front right. Karina WilliamsLincoln High School sophomores Devona Do, right, lights Caitlin Zumalt's hands on fire as Abir Hegazi, middle, talks to the children. Karina WilliamsLincoln High School junior, Chantelle Chubon explains density with her liquid display to, from left, Cody Burgans, second-grader at Carlin C. Coppin, Griffin children of Rocklin, Daniel, 6, Rosalie, 7, and Joseph, 5. Christine Griffin said the Science Expo was so wonderful she took her children out of school. Karina WilliamsLincoln Crossing third-grader Sarah Lopez, left, is excited after testing her copper rod on a flame to see the flam turn blue. Tucker Niles, left and Isaac Ackerman, second-graders from Carlin C. Coppin and Sydney Abshear, third-grader at Lincoln Crossings test thier copper rods too.