Question

a student conducts an experiment to determine the effect of adding salt on the boiling temperature of water. the results are shown below.

sample	amount of salt	boiling temperature
sample 2	2 g	102.3° c
sample 3	5 g	104.8° c
sample 4	10 g	107.5° c

which is the independent variable in this experiment?
volume of water
time required for water to boil
amount of salt added
boiling temperature

Explanation:

In an experiment, the independent variable is the factor that the experimenter changes or manipulates. Here, the student is changing the amount of salt added to observe its effect on the boiling - temperature of water. The volume of water and time are not mentioned as being varied, and the boiling temperature is the dependent variable (the one that changes in response to the independent variable).

Answer:

amount of salt added