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Learners apply their knowledge from a previous study to identify different liquids--water, corn syrup, and vegetable oil.

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.

Make a quick and easy filter from household materials. A filter will catch any solids suspended in a liquid and filter them out. By using a filter, learners can discover amazing things.

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