(Question)
A given volume of a denser substance is heavier than the same volume of a less dense substance.  Sarah is carrying two tubs, one is filled with rocks, the other with feathers. The tub with rocks will be heavier because it is more dense or less dense?
(Answer)
more dense


(Question)
In the larger container we will still have the same number of gas particles, but now they are filling a much larger space.  If Jim has a container of hydrogen gas that is 50 liters in volume and he moves the gas to a container that is 40 liters in volume, what happens to the density of the gas increases or decreases?
(Answer)
increases


(Question)
Better farming techniques and machines increased the food supply and the distribution of food.  Jonah's family was barely getting any food when they plowed the field by hand, but when they got machines to help, the food supply decreased or increased?
(Answer)
increased