Transition reaction, i.e.the reactionbetween glycolysis and the citric acid cycle) converts pyruvate, a 3-carbon molecule, into acetyl CoA, 2-carbon molecule. Thus, the answer is: Transition reaction.
After the worms have finished eating their food, the students must now weigh the worms and record this data. They can then compare these new weights to the starting weights of the worms and see if it demonstrates their hypothesis. Hope this helped :)