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In this chemistry challenge, learners identify an unknown white powder by comparing it with common household powders.

In this challenge, learners have to figure out in what order to combine five solutions to change the color from clear, to yellow, to blue, and back to clear.

In this chemistry challenge, learners combine acids and bases in a universal indicator to create five different colors.

Learners are challenged to create solutions that conduct electricity and make a buzzer buzz (or an LED light up).