Final answer:
To measure the volume of liquid in a graduated cylinder, make a reading at the bottom of the meniscus and mentally subdivide the distance between markings into tenths of a milliliter.
Step-by-step explanation:
To measure the volume of liquid in a graduated cylinder, you should make a reading at the bottom of the meniscus, the lowest point on the curved surface of the liquid.
The graduated cylinder is calibrated in milliliters, so you need to estimate the volume by mentally subdividing the distance between the markings into tenths of a milliliter.
For example, if the liquid level is between the 21 mL and 22 mL marks, you would estimate the volume to the nearest tenth, such as 21.7 mL or 21.5 mL.