Not all liquids are the same. Some are thin and flow easily. Others are thick and gooey. A liquid's resistance to flowing is called its viscosity. Honey and corn syrup are more viscous than water.
Viscosity is an important property of drilling fluids .
The more viscous the fluid, the more easily it will suspend cuttings and carry them up to the surface. On the other hand it requires more pressure to pump very viscous fluids and they are harder to wash off the cuttings. The viscosity of most liquids is effected by temperature. To test this we experimented with corn syrup. Pick two marks on the scale of the graduated cylinder to use as reference points, e.g. 40ml and 10ml.