Ositos de goma
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Este documento describe un experimento sobre ósmosis usando ositos de goma. Los ositos se sumergen en agua, vinagre, agua salada y agua con bicarbonato para observar cómo cambian de tamaño y peso debido al fenómeno de ósmosis. Los estudiantes miden y pesan los ositos antes y después, calculan los cambios de volumen y masa, y representan los resultados en gráficas para analizar cómo cada sustancia afecta de manera diferente a los ositos y explicar los cambios observados en términos de ó
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Ositos de goma
- 1. ÓSMOSIS OSITOS DE GOMA PRÁCTICA ______ Ampliación de FyQ http://www.scienceforkidsblog.blogspot.com.es/2013/06/gummy-bear-science.html?m=1 FUNDAMENTO TEÓRICO(complétalo después de realizar la prácticar y entender lo que ocurre) MATERIAL Ositos de gominola. Un vaso con agua. Un vaso con vinagre. Un vaso con agua salada. Un vaso con agua y bicarbonato. __(añade aquí cualquier otra sustancia que utilices)___ PROCEDIMIENTO Prepara las mezclas anteriores en una proporción aproximada de 50 ml de agua y una cuchadarita de bicarbonato, sal… Mide cada osito y pésalo. Anota su color y haz una ficha con cada uno de ellos (puedes basarte en las imágenes que te incluyo abajo) Introduce a cada osito en su vaso correspondiente. Déjalos a remojo durante unas horas. Sácalos del vaso y déjalos secar sobre un folio. Puedes poner otro ‘normal’ al lado para ver los cambios. Mide y pesa los ositos Calcula el % de aumento/disiminución de volumen y de masa. CUESTIONES 1. Representa en una gráfica de barras los cambios de volumen. Haz lo mismo con las masas. 2. Haz una ficha con lo que observas y con los cálculos realizados (se valora un buen diseño y organización de los datos). 3. ¿Afectan todas las sustancias de la misma forma a los ositos? 4. ¿Qué fenómeno explica los cambios físicos observados? 5. ¿Qué le ocurre al osito sumergido en vinagre?