What is the method called that determines the volume of an object by measuring the amount of liquid it displaces?

The method that determines the volume of an object by measuring the amount of liquid it displaces is known as liquid displacement. This technique is based on the principle that when an object is submerged in a fluid, it pushes aside a volume of the fluid equivalent to the object's own volume. This can be easily observed by placing an object in a graduated cylinder filled with water and measuring the rise in water level, which indicates how much water has been displaced by the object. This method is particularly useful for irregularly shaped objects where direct measurement of volume may be challenging.

The other choices represent different concepts. Volume measurement is a general term and does not specifically refer to the displacement method. Water submersion refers to the action of placing an object in water but does not describe the process of measuring the resulting displacement. Calorimetry is a technique used to measure the heat of chemical reactions or physical changes, unrelated to measuring volume through displacement. Hence, liquid displacement is the most accurate description of the method in question.