The instrument typically used in a scientific experiment to measure volume is the graduated cylinder. A graduated cylinder is a cylindrical container marked with precise gradations for measuring liquid volumes. It allows for accurate and easy measurement of liquids, making it indispensable in laboratories. The design of the graduated cylinder, with a spout for pouring and a stable base, helps ensure that measurements are both reliable and reproducible. Graduated cylinders come in various sizes, providing flexibility for different experimental needs, and are commonly made of glass or plastic for durability and visibility.