This chapter deals with the study of liquids and gases, which are known as fluids. It explains the concepts of pressure, thrust, buoyancy, density, and Archimedes’ principle. Students learn how fluids exert pressure and how objects behave when placed in fluids. The chapter also covers important applications of fluid concepts in daily life.Key Topics:• Pressure in fluids• Thrust and buoyancy• Density and relative density• Archimedes’ principle• Floating and sinking of objects• Applications of fluids