Sarah wanted to know if water boils faster if salt is added to it. She put two liters of water in two identical pots, then added three tablespoons of salt to one pot. She put both pots on a stove, each on high heat.
She then recorded how long it took for each pot of water to boil.
Which factor is a constant in this experiment?
A) the amount of water in each pot
B) the amount of salt in each pot
C) the time it takes for the water to boil