An intervening variable facilitates a better understanding of the relationship between the independent and dependent variables when the variables appear to not have a definite connection. They are studied by means of operational definitions and have no existence apart.
Difference between Microevolution and Macroevolution. â¢ Micro evolution refers to visible changes in a population of the same species over a period of time. â¢ Macroevolution is what evolution is as described by the theory of evolution by Darwin.
Difference between CPVC and PVC. â¢ While PVC is the most widely used thermoplastic polymer, CPVC is a recent phenomenon created by chlorination of PVC. â¢ PVC is still more popular than CPVC which is more expensive. â¢ CPVC is better suited under certain conditions such as transport of hot and cold liquids.