A metric ruler measure a legth not a volume.
A graduated cylinder.
ml
A graduated cylinder uses milliliters not millimeters. Hopefully I'm not too later for this fix.
Not neccessarily, but it rarely isn't these days.
A measuring pipette. It has specific metric units as compared to a graduated cylinder.
The property is volume, more specifically of a liquid, which can be measured using a graduated cylinder.
Graduated cylinders typically measure in milliliters or thousandths of a liter.
A graduated cylinder, and a millilitre.
Graduated cylinder
in the metric system the lines refer to milliliters
The most usual method to measure volume, using the metric system, is by means of a graduated cylinder. You can pour a fluid into it and then read the volume as marked on the cylinder.
If the object is oddly or irregularly shaped, then it's much easier to measureits volume with the graduated cylinder than with the ruler. But the volumeis the same no matter how it's measured. If the results are not the same,then at least one and possibly both measurements were done wrong.