How does “freeze-drying” work? (teacher information)
Text
Teaching methods:
Teaching methods for teachers on the worksheet of the same name
English, Spanish (CREA), German
2018-03-14
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The teaching methods specify the learning prerequisites for completing the task on the worksheet. In addition to knowing about the states of aggregation of water and the transitions between the phases (solid – liquid – gas), the students should be familiar with sublimation and resublimation as special cases of phase transition. They should also be acquainted with the representation of the phases on a phase diagram.
The background on the task and possible variations are provided.
The six incremental hints for the task are provided with the corresponding answers. They are also available as a separate ready-to-print medium named “How does ‘freeze-drying’ work? (hints for printing)” or as an interactive medium named “How does ‘freeze-drying’ work? (interactive hints)” on the media portal of the Siemens Stiftung.
The background on the task and possible variations are provided.
The six incremental hints for the task are provided with the corresponding answers. They are also available as a separate ready-to-print medium named “How does ‘freeze-drying’ work? (hints for printing)” or as an interactive medium named “How does ‘freeze-drying’ work? (interactive hints)” on the media portal of the Siemens Stiftung.
Teaching ideas; Teaching methods
Chemistry; Physics
Grade 5 to 6; Grade 7 to 9; Grade 10 to 13
Middle/high school
Pressure (physics); State of aggregation
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