how does the density of water change at temperatures above 4°c?\nincreases\ndecreases

Brief Explanations:

Water has a unique property where its density is maximum at 4°C. Above 4°C, as the temperature increases, the water molecules gain more kinetic energy and move more vigorously, causing the volume to expand while the mass remains constant. According to the density formula $\rho=\frac{m}{V}$ (where $\rho$ is density, $m$ is mass, and $V$ is volume), when volume increases and mass is constant, density decreases.

Answer:

Decreases