In science what is a manipulated variable,controlled variable,responding variable?

my daughter is in 5th grade and wants an easy way of saying it.In science what is a manipulated variable,controlled variable,responding variable?
The manipulating variable is the one you change to see what happens to the ';responding'; variable.





The responding variable is the one that changes in response to your changing the manipulating variable.





The controlled variable(s) is (are) the one(s) that you hold constant and don't allow to change.





For example: Let's say you're doing an experiment to find out if drinking lots of Kool-Aid makes you stronger. You take two groups of people, and you feed them exactly the same things, EXCEPT that Group A gets lots of Kool-Aid and Group B gets lots of water.





Manipulated variable: Kool-Aid. One group drinks lots, the other drinks none.





Responding variable: How strong the person is. One group will demonstrate that they can (maybe) lift some amount of weight. Can the other group lift that, too?





Controlled variable: All other aspects of the diet, e.g. how much they're eating, what kinds of food they eat, how much candy. These are all kept identical between the groups.