(Q).
Given the fact that: The more tightly packed the particles inside the material are, the more dense we say they are. Answer the question: When we pack a lot of things into a box it becomes less dense or more dense?
(A).
more dense

(Q).
Given the fact that: The further objects are away from each other, the smaller the gravitational force. Answer the question: The sun exerts gravitational force on all the planets, which has a higher gravitational force earth or mars?
(A).
earth

(Q).
Given the fact that: When the heart expels more blood with each stroke, the heart has to beat less often in order to maintain the same volume of blood flow. Answer the question: Jan had a very low heart rate, but was perfectly healthy, indicating that her heart expels blood in amounts that are greater or lesser?
(A).
lesser