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An unchanged independent variable used for comparison is called a control variable.
Varible
Varible
It is unchanged by the reaction.
A CONTROL is a standard used for comparison
The positive degree of comparison is used. (That it, no comparison is made.)
The positive degree of comparison is used. (That it, no comparison is made.)
The positive degree of comparison is used. (That it, no comparison is made.)
The positive degree of comparison is used. (That it, no comparison is made.)
A comparison using like or as is a simile. A comparison without them is a metaphor.
The positive degree of comparison is used. (That it, no comparison is made.)
These are commonly used interchangeably, and the distinction between them is a small one. "Comparison to" should be used when comparison is made between specific people, things, or other instances. Example: John is an excellent student in comparison to his shiftless brother Mike. "Comparison with" should be used when comparison is made to a group or an indefinite (i.e. uncountable) entity. Example 1: John is an excellent student in comparison with the rest of his class. Example 2: John has excelled in school in comparison with what I feared.