Why is skim milk more dilute than 2 percent milk?

Skim milk is more dilute than 2 percent milk because it contains little to no fat, resulting in a lower overall concentration of solids and nutrients. In contrast, 2 percent milk has a higher fat content, which contributes to a creamier texture and a richer flavor. The difference in fat content affects the viscosity and mouthfeel of the milk, making skim milk less dense than its 2 percent counterpart.