Question

practice it! george wants to find out which liquid will boil the fastest: saltwater or sugar water. he sets up his experiment: - he measures 100 milliliters of tap water in three beakers. - he adds 2 tablespoons of sugar to one beaker, and 2 tablespoons of salt to another beaker. - he leaves the third beaker of tap water unchanged. - he boils each liquid on his stove and measures the time it took to boil with a timer. which of the following are the control variables? type of liquid amount of water type of beaker timer stove for heating

Explanation:

Control variables are factors kept constant in an experiment to ensure that only the variable being tested (type of solute here) affects the outcome. Amount of water, type of beaker, timer, and stove for heating are kept the same across trials. Type of liquid is the variable being manipulated.

Answer:

amount of water, type of beaker, timer, stove for heating