How can two objects of similar shape and size have different densities?

Because its what its made out of, its the same thing as a pound of bricks and a pound of feathers. the feathers are more denser because it takes more to make a pound. I hope this helps.

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

answer: you could do some invislibe ink.

explanation: i will tell you how to if u answer my question.