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How dense these liquids are!

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Area

Chemistry

Age

10 to 12 years

Duration

60 min.

Participants

30 to 35 girls

WHAT IT IS ABOUT

Discover why some liquids mix and others do not.

In this activity, the girls experiment with water, oil and alcohol to observe what happens when they are combined. Through the comparison between mass and volume, they discover that each substance has a different density and that this influences how they arrange themselves or mix. They also analyze how these results change when modifying quantities or combinations of liquids.

What are we going to do?

  • Mix water, oil and alcohol.
  • Observe which liquids separate.
  • Compare which liquid weighs more.
  • Test changes in the mixtures.
  • Discover what density is.

What is learned?

  • What density is.
  • How mass and volume are related.
  • Why some liquids do not mix.
  • How mixtures change when varying quantities.
  • How to observe phenomena scientifically.

Resources

Ficha de la actividad (ES)
Folha de atividades (PT)

Information for host sites:
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Equipo de trabajo

María Cecilia Bertero
Specialist in Didactics of Mathematics (FHUC – UNL). Professor of Mathematics (FHUC – UNL). Teacher at UNRaf, UCSE – DAR and ISP N°2 (Rafaela). Head of the Mathematics and Statistics area of the Faculty of Technologies and Innovation for Development at Universidad Nacional de Rafaela. CONICET fellow (PhD in Education in Experimental Sciences FBCB – UNL).

Emilio Moscardo

Ana María Falchini
Construction Engineer (UTN -FRSF). International Postgraduate in “City and Municipality” (EPOCA – Universidad de Firenze and Universidad Carlos III). Former teacher at UTN-FRR. Participant in the Mathematics and Statistics area of the Faculty of Technologies and Innovation for Development at Universidad Nacional de Rafaela, through the execution of Community Articulation Projects.