A Pre-Kindergarten - Grade 12 co-educational independent day school in Westchester, New York

Middle School Students Experiment with the Mpemba Effect during January Freeze

During last week’s frigid weather, Ms. Sackey took her seventh grade students outside to observe the Mpemba Effect. A heavily debated and mysterious anomaly for chemists and physicists to this day, the Mpemba Effect asserts that under sub-zero temperatures, boiling water freezes more quickly than room temperature water. 

 

To complete the experiment, students compared the differences between a 100 mL beaker of "room temperature water" and the same volume of "boiling water" when thrown into the cold air. Students watched from a safe 10-foot distance as most of the boiling water in every trial turned to tiny ice crystals (forming a temporary half-moon-shaped cloud), while the water thrown at room temperature remained liquid (falling in large droplets to the ground). 
 
A fun and engaging winter science experiment!
 

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