If you are working with liquids in a lab setting you will constantly be working we a graduated cylinder. We commonly use them to measure the volume of a liquid. If you look at the name, it makes a great deal of sense. It is graduated because of the graduated (layered) lines labeled on the side of the cylinder shape. In most cases, you will be measuring the volume of aqueous (a substance dissolved in water) solutions. These solutions tend to stick to the sides of the cylinder due to surface tension and this usually causes the top of the solution to be curved forming what we call the meniscus bubble. We read the bottom of that bubble to indicate the value of the volume.
These worksheets explain how to read graduated cylinders. Scales are presented as tic marks between whole numbers, and answers will include decimals. Answers should be presented in ml.