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How do scientists measure how clear or murky water in a lake is? How does water clarity (clearness) affect what lives in the lake?

In this activity, learners conduct an experiment to investigate the effect of elevated levels on CO2 on plant growth.

In this quick and easy activity, learners build an air cannon "drum" and see what happens when they "shoot" puffs of air at different targets.

In this activity, learners construct a small "air cannon," and use its airflow to put out a candle (lit with the help of an adult).