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Learners build a filter from old soda bottles and dirt. They create polluted water, and pour it through their filter to clean it.

"Exploring the Universe: Filtered Light" demonstrates how scientists can use telescopes and other tools to capture and filter different energies of light to study the universe.

In this activity, learners explore how engineering has developed various means to remove impurities from water.

Water treatment on a large scale enables the supply of clean drinking water to communities.