The independent variable is the different amounts of salt that will be added to the water.
A variable is any characteristic, number, or quantity that can be measured or counted.
The independent variable is the different amounts salt that will be added to the water (what is done by the scientist).
The dependent variable is the boiling temperature of the water (what is being measured).
HYPOTHESIS: If salt is added to water then, the boiling temperature is lowered.
Hence, the independent variable is the different amounts of salt that will be added to the water.
Learn more about the variable here:
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