Why a hydrometer is made heavy near bottom?

A hydrometer is made heavy near the bottom to ensure stability and accurate readings. The added weight lowers the center of gravity, allowing the hydrometer to float upright in the liquid. This design helps prevent it from tipping over and ensures that the scale is properly calibrated for measuring the density or specific gravity of the liquid. Additionally, the weighted bottom allows for more precise measurements in a wider range of liquid densities.