To find the difference in weight between the heaviest object and the lightest object, you need to subtract the weight of the lightest object from the weight of the heaviest object.
For example, if the heaviest object weighs 100 pounds and the lightest object weighs 50 pounds, the difference in weight would be:
100 pounds (heaviest object) - 50 pounds (lightest object) = 50 pounds
Therefore, in this scenario, the difference in weight between the heaviest and lightest objects is 50 pounds.