why is tin foil shiny on one side and dull on the other?
Independent: What is changed to change the dependent variableDependent: It changes depending on the independent variableControl: The 'constant' variable, it doesn't change.
the independent variable is the type of wrap used- bag, aluminum, or plastic wrapthe dependent variable is whatever youre measuring about the apple slices-how brown they get, etc the control in your experiment is just the face that you kept things constant- ie that all 3 slices used were the same kind of apple, etc.things that would get in the way of your results if they werent normal.
The independent variable (control variable) is the variable that YOU controlIn this case, it is the material in which the apple slice is wrappedThe dependent variable is the amount of spoilage shown by each apple slice (however you want to measure it)It DEPENDS on the independent variable.
the independent variable is the variable that you change on purpose - in this case the thing your wrapping it inThe dependent variable changes as a result of you changing the first variable - the length the apple stays fresh forThe control variable are the variables which need to be controlled throughout the experient, so temperature of room it is kept inThe size and weight of the piece of appleHope I helped!!!
The shiny side is produced when the aluminum is rolled during the final passIt is nearly impossible to produce rollers with a gap fine enough to cope with the foil gauge, therefore, for the final pass, two sheets are rolled at the same time, doubling the thickness of the gauge at entry to the rollersWhen the sheets are later separated, the inside surface is dull, and the outside surface is shinyThis difference in the finish has led to the perception that favoring a side has an effect when cookingWhile many believe that the shiny side's reflective properties keep heat out when wrapped on the exterior and keep heat in when facing exterior, the actual difference is imperceptible without instrumentation
