Which physical property describes a fluid's resistance to flow?

Which physical property describes a fluid's resistance to flow?

• A. Viscosity
• B. Elasticity
• C. Malleability
• D. Color

Answer: (A)

Viscosity is the property that describes a fluid's resistance to flow. It tells you how thick or sticky a liquid is and how easily it moves. High viscosity means a liquid resists motion and flows slowly, like honey; low viscosity means it flows readily, like water. Elasticity describes how a material returns to its original shape after being stretched or squeezed, which isn’t about flow. Malleability is about bending and shaping a material, not how fluids move. Color isn’t related to flow either. So the idea that best matches a fluid’s resistance to flow is viscosity.

Viscosity is the property that describes a fluid's resistance to flow. It tells you how thick or sticky a liquid is and how easily it moves. High viscosity means a liquid resists motion and flows slowly, like honey; low viscosity means it flows readily, like water. Elasticity describes how a material returns to its original shape after being stretched or squeezed, which isn’t about flow. Malleability is about bending and shaping a material, not how fluids move. Color isn’t related to flow either. So the idea that best matches a fluid’s resistance to flow is viscosity.