Hydrometers

Calvin loved playing in water when he was a baby, and it turns out not much has changed. Our science exploration this week, building on what we did last week, revolved around the what, how, and why of hydrometers. Out came the kitchen scale again, and several of the objects we used for our demonstration last week, plus a few additional items, all followed up by a field trip to our local home brewing store (where else would you go to get a trusty hydrometer?)