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In Book Three of the Acadia Files series, Acadia Greene carries her search for answers into winter.A melting snowman leads her -- of course! -- to explore climate change and how to reduce her carbon footprint. The helium balloons at her eleventh birthday party beg questions -- naturally! -- of molecular structure, weights of gases,and neutral buoyancy. An afternoon making paper airplanes brings discoveries in aerodynamics. Tracks in the snow raise questions of how animals survive the winter. And an afternoon of sledding slides right into an investigation of momentum, acceleration, and friction. Acadia doesn't mean to do science -- it just happens. She's curious, determined, bold, and bright -- a wonderful STEAM ambassador!The Acadia Files is a fun introduction to the wonders of science,using real-world scenarios to make scientific inquiry relatable and understandable. Parents and educators can use The Acadia Files to let kids discover for themselves what it's like to be curious about the world and to satisfy that curiosity with scientific thinking. Spot color