Gemini: Your observation is correct! Steel is heavier than feathers so a kilogram of steel is heavier than 20 bricks of feathers. They both weigh the same.

Let’s explore more about weight and densities

On the one hand, I’m proud that my son does this,. On the other hand, I need him to empty his pockets before they go in the wash, because even with a pre-wash check we only have an 80% success rate.