A variable that can be Operational Define

Can someone identify a variable for scientific study that can be operationally defined. Also, create an operational definition for the variable. Identify what aspects of the variable would be observable and measurable.



Thank you to anyone that can help :))

As opposed to what you may hypothesize (conceptual variables), operational variables are the measurable properties. If you're studying pine cones for example, their length, diameter, weight, color etc.