Question

the passage below describes an experiment. britneys sister thought that different ice - cubes would cool soda at different rates. britney wondered whether crushed ice would cool soda faster than whole ice - cubes. britney filled six glasses with the same amount of soda. she put crushed ice cubes in two glasses, whole ice cubes in two glasses, and no ice cubes in the remaining two glasses. then, she measured the temperature of the soda in each glass every minute for five minutes. complete the sentence. in this experiment, the glasses with soda and whole ice cubes were part of _. a control group an experimental group

Explanation:

In an experiment, the control group is used for comparison. Here, glasses with whole - ice cubes are compared to glasses with crushed ice cubes and glasses with no ice cubes. They help to determine the effect of crushed ice on cooling soda by providing a baseline for comparison.

Answer:

a control group