How does temperature affect the speed of sound in water?

The speed of sound in water is influenced significantly by temperature, primarily because temperature affects the density and elasticity of the water. As temperature increases, the molecules in the water move faster, which facilitates quicker transmission of sound waves. This increased molecular movement lowers the density of water at higher temperatures, allowing sound waves to propagate more efficiently.

Therefore, the correct answer highlights that the speed of sound increases with temperature due to the lower density of water. In warmer water, sound waves can travel faster because the kinematic viscosity is lower and the molecules are more energetic, thus allowing more effective transmission of sound energy through the medium.

When considering the impact of temperature on sound speed, it’s important to recognize that ocean sound propagation is nuanced and can also be affected by other factors like salinity and pressure, but the direct impact of increasing temperature remains a key factor in understanding sound speed dynamics in aquatic environments.