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Mercedes MacíasJunio 2011
¿Mezclas homogéneas o heterogéneas?
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Separación de mezclas heterogéneasDesarrollo de la experiencia: 1. Vaso de precipitado con 50 ml de agua y 50 ml de aceite. Agita y
observa que ocurre.2. En una caja petri echamos una cuchara de arroz y una de
limaduras de hierro y removemos.3. En otra caja petri echamos una mezcla de arroz y harina.4. En un vaso con 150 ml de agua añadimos una cucharada de arena
y removemos.
Cuestiones sobre la experiencia: Describe lo que ocurre en cada una de las mezclas que has realizado.¿Qué método utilizarías en cada caso para separar sus componentes?
Mercedes Macías
agua
agua
aceite
embudo de decantación
sal
imán
hierro
agua
embudo
arena
papel defiltro
Objetivo:Separar los componentes de una mezcla heterogénea.
Material de trabajo:Vasos de precipitadoColadorPapel de filtroCaja petriSoporteImánEmbudo de decantaciónAgua, AceiteArroz, HarinaArena
arenagrava arcilla
5º de EPOJunio 2011
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Formación de cristales
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Agradecimientos:A los alumnos. Pablo charlo, Manuel García, Nieves Sánchez, Irene Martín que me ayudaron a realizar esta actividad. A mi compañera Yayo y a todos los chicos de 5º de primaria pos su interés y buen comportamiento.