1 experiment in this category

Two stacked pairs of bottles: in one, yellow and blue water stay in separate layers; in the other, they have mixed to green Physics, Ecology

Hot and Cold Water Cups

10 min to 6 hours

Supplies: Water of different temperatures; Identical-sized clear cups; Food coloring; ...

Concepts: Density(Physics); Thermohaline circulation(Ecology); Lake turnover(Ecology).