Question

sodas in a cooler filled with ice cubes
kevin runs a catering business. he wondered where he should chill sodas for an event: in the fridge, a cooler filled with ice water, or a cooler filled with ice cubes. he recalled that solids conduct heat better than liquids or gases, so he reasoned that the fridge should be the least effective, and the cooler with solid ice should be the most effective. to test his idea, kevin opened nine bottles of soda and measured their temperatures. he put three in the fridge, three in a cooler with ice water, and three in a cooler with ice cubes. he checked the sodas temperatures every five minutes and compared them. the sodas in the fridge cooled the slowest, as expected. but surprisingly, the sodas in the ice water cooled the fastest! he realized that the solid ice did not touch the cans entire surface, while the ice water did. kevin revised his prediction: encasing the sodas in a block of ice would cool them the most effectively, but it was more practical to use ice water. he

Explanation:

The part "He recalled that solids conduct heat better than liquids or gases, so he reasoned that the fridge should be the least effective, and the cooler with solid ice should be the most effective." shows Kevin forming a hypothesis based on his knowledge of heat - conduction properties.

Answer:

He recalled that solids conduct heat better than liquids or gases, so he reasoned that the fridge should be the least effective, and the cooler with solid ice should be the most effective.