Each group should discuss their results. The total findings should be discussed. Wind up the toys and put it into the liquids. Discuss the results. Through the step by step discussions, students should begin to realize that viscosity is one of the most important properties of lubricating oil.
Viscosity is a measurement of resistance to flow or how thick or thin an oil is.
Lubricant flow characteristics are relative to temperature. When temperature is increased, viscosity is decreased and vice-versa. Students should understand the motion of molecules in matter before and after heat is applied.