> What is heavier a liter of bricks or a liter of feathers? >> A liter of bricks and a liter of feathers both weigh the same—1 kilogram—since they each have a

> What is heavier a liter of bricks or a liter of feathers? >> A liter of bricks and a liter of feathers both weigh the same—1 kilogram—since they each have a volume of 1 liter. However, bricks are much denser than feathers, so the bricks will take up much less space compared to the large volume of feathers needed to make up 1 liter. The difference is in how compactly the materials are packed, but in terms of weight, they are identical.