Which of these has the greatest density? a. an iceberg b. a gallon of water c. an aluminum can d. a small piece of lead

So with bigger space occupied a bigger density. In this case A) an iceberg made of ice has a bigger density. While lead would be the substance with a bigger density per gram.

Explanation:

Density is the level of compactness a specific substance has. In other words space, a specific substant occupies. Some substances have a bigger density than others. Because all off them have different chemical and physical compositions. The formula to calculate it is:

Density = mass of the substance/ volume

From this group

lead has a density of 11.342 gram per cubic centimeter

Ice has a density of 0.92 gram per cubic meter

Aluminum has a density of 2.7 gram per cubic meter

Water has a density of 1 gram per cubic meter.

So with bigger space occupied a bigger density. In this case, ice has a bigger density.