It’s all about chemistry as Science Museum Oklahoma, 2100 N.E. 52nd, salutes that one high school class that totally wrecked your GPA, bro. From 9 a.m. to 4 p.m. Friday, it’s Chemistry Day with special activities like “Playing with Polymers,” “Reaction Rockets” and “Guess the Gas” (a big hit at our Thanksgiving table). Admission is $9.95-$11.95. Call 602-3760 or visit sciencemuseumok.org.