Tyrell is doing an experiment to find out which evaporates faster-water, liquid soap, or apple juice. To make sure Tyrell's experiment is a fair test, he should

See below for the answer.

Explanation:

Tyrell should use the same amount (volume) of each substance as well as subject them to the same conditions during throughout the course of the experiment.

A fair experiment is one that is devoid of any form of prejudice. All the independent variables must be constant for the three substances in order to test the independent variable and arrive at a fair result.