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!