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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.

Learners design their own experiment to investigate how pollution diffuses through ground material.

In this experiment, learners will explore whether increased carbon dioxide makes our oceans more basic or more acidic.

This lesson gives full instructions for making cabbage juice indicator, a procedure sheet for learners to record observations as they use the indicator to test materials, and extension activities to d