As we have learned which activities take more or less time, the experiments have changed. We are continually on the watch for experiments that would adapt well to the Science Challenge. It is important to rotate the laboratory activities each year as information about the competition is spread throughout the participating schools. Given two forces, students determine the third force to produce equilibrium. Students find the focal length of a lens.
Students determine the circuit diagram of four bulbs and two switches.
Connecting wires are not visible. Students determine the molecular weight of two unknown acids, one monoprotic and the other diprotic. Students identify unknown ions based on the Rf values. By plotting a graph of ratio to temperature, the optimum ratio is obtained. Given samples of sugars, starches and proteins, students determine the purpose of an iodine test, a Lugol's reagent test and a Biuret test.