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In this quick activity, learners drink Avogadro's number worth of molecules - 6.02x10^23 molecules!

Learners measure a bottle full of air, and then use a vacuum pump to remove the air. When they re-weigh the bottle, learners find the mass is about 0.8g less.

"What's in the Water" lets participants use tools to solve the mystery- what chemicals and compounds are in a sample of water?

This is an activity in which learners will find that they can detect differences in concentration better with their nose (smelling) than with their eyes (seeing).