Driving question : How does the temperature change during the cooling of stearic acid?

In this activity, the cooling of stearic acid, changing from liquid to solid is studied. Students record the temperature of stearic acid as it cools.

Topic: States of matter,
Concepts: Change of state, Liquid state, Melting temperature, Mixture, Pure substance, Solid state,
Grade level: Middle School (11-14 years),
Activity type: Data logging,
Sensors: Temperature sensor,
Interface requirements: Single analog sensor input,

The Student Worksheet gives investigation instructions for students.

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The Teacher Notes includes teacher commentaries such as didactical approach, exemplary questions, assignments and data analysis.

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The Science Background describes the scientific principles that underlie the activity.

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Coach Activity/Result file can be opened in the Coach 7 Program. This requires Coach 7 to be installed on your computer.

Download activity Cooling curve of stearic acid (.cma7) Download result (.cmr7)