(Question)
Answer the question based on the following text.  Question:   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?    Text:  A given volume of a denser substance is heavier than the same volume of a less dense substance.
(Answer)
more dense


(Question)
Answer the question based on the following text.  Question:   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?    Text:  In the larger container we will still have the same number of gas particles, but now they are filling a much larger space.
(Answer)
increases


(Question)
Answer the question based on the following text.  Question:   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?    Text:  Better farming techniques and machines increased the food supply and the distribution of food.
(Answer)
increased