Jack hypothesize that more mold will grow on a slice of bread that is left in the dark that a slice of bread left in the light he wants to do in experiment to test this hypothesis jack has four slices of bread for this experiment was condition should not be the same for the four slices of bread in order to test a hypothesis a the type of bread b used to be where the bread is placed c how long the bread is being observed the amount of jelly on them