Question

reggie wants to test the effect of salt on the boiling point of water. he uses equal amounts of water in two 500 ml containers but adds 35 grams of salt to one container. he then heats the water to boiling and measures the temperature of the water when it boils. 5. the independent variable is: a) the salt added to water b) the boiling point temperature of the water c) the amount of water used d) the amount of heat applied to the water

Explanation:

An independent variable is what is changed in an experiment. Here, Reggie changes the amount of salt added to water to test its effect on the boiling - point. The other factors like the amount of water and heat are kept constant, and the boiling - point temperature is the dependent variable that is measured based on the change in the independent variable.

Answer:

a) the salt added to water