Which of the following is true about density and weight?

A) density is higher if you have a larger volume of the same material
B) density is lower if you have a larger volume of the same material
C) a substance is more dense at night than during the day
D) weight depends on the mass of the object and the pull of gravity
E) none of these

Density is a property that describes the mass per unit volume of a substance and does not change with the volume of the material or the time of day. Weight, however, is the force exerted by gravity on an object and depends on the object's mass and the gravitational pull, which varies with location but not with time of day in any significant way for most practical purposes.