High volume and low mass result in low density because density is calculated by dividing mass by volume. When the mass is low compared to the volume, the density will also be low because there is less mass per unit of volume.
An object with high volume and low mass has low density. Density is a measure of how much mass is contained in a given volume, so high volume and low mass results in low density.
Iron is a dense metal, not low density. Its density is around 7.87 g/cm³ at room temperature.
A box with high density will have more mass packed into the same volume compared to a box with low density. This means that the high-density box will be heavier and contain more material in the same space as the low-density box.
High density materials have tightly packed particles, resulting in greater mass per unit volume (e.g. lead, gold). Low density materials have more spaced-out particles, leading to lower mass per unit volume (e.g. styrofoam, cork).
Charcoal has a low density because it is porous and lightweight.
Boil it on a low simmer. If you boil it too high the chicken will get tough and rubbery.
high
Quite low density: 0.968 g·cm−3
low
Liquids can boil at low pressure, and in fact do so at lower temperatures than when the pressure is high.
Diffusion.
Gasses have an incredibly low density, less than a liquid or a solid.
High volume and low mass result in low density because density is calculated by dividing mass by volume. When the mass is low compared to the volume, the density will also be low because there is less mass per unit of volume.
Low.
An object with high volume and low mass has low density. Density is a measure of how much mass is contained in a given volume, so high volume and low mass results in low density.
Low density: Gas High density: Solid Quite high density: Liquid