What phenomenon caused the increase in water level when Terry placed a marble in a graduated cylinder?

The increase in water level observed when Terry placed a marble in a graduated cylinder is attributed to the phenomenon of displacement. When an object, such as the marble, is submerged in a fluid, it occupies space that was previously taken up by the fluid. This causes the fluid to move, resulting in a rise in water level within the cylinder.

Displacement is fundamentally tied to Archimedes' principle, which states that any object submerged in a fluid experiences an upward force equal to the weight of the fluid displaced by that object. This principle explains why the marble causes the water level to rise; the volume of water displaced is equivalent to the volume of the marble submerged in the fluid. Therefore, the correct answer reflects the relationship between the submerged object and fluid dynamics in the scenario presented.