What instrument is used to measure the volume of a liquid?

The graduated cylinder is specifically designed to measure the volume of liquids accurately. Its tall, narrow shape allows for precise measurement, and the markings on the side provide the user with a clear scale to read the volume. This makes it particularly useful in scientific experiments where accuracy is essential.

In contrast, while a beaker can hold liquids, it is typically used for mixing and pouring rather than precise measurement. A thermometer is used to measure temperature, and a ruler is meant for measuring length or distance, making them unsuitable for measuring liquid volume. The graduated cylinder stands out as the best instrument for this purpose due to its design and calibration.