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News from the Provinces
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Page 9
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Measuring Hydrostatic Pressure
Ibu Atit Djuwita is a Science teacher at SMPN 4 Tarogong Kidul, Garut, West Java. She taught student;s in class VIII-C on the basic
competency " Examining the effects of pressure on solid objects liquids and gases and their application in daily "ife". The following story is
about her experience in teaching the basic competency in her class, a process which was enjoyed by student's.
Student's Preparation at Home
Student's prepared plastic bottles and made five holes from the top to the bottom at 3 cm intervals. The student's labeled each hole alphabetically, from A at the top to E at the bottom. All of these holes were then covered using sticky tape.
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Learning Activities
Ibu Djuwita asked the students to explain the meaning of pressure, which they had discussed in the previous lesson. To help students, she asked them to compare the pressure of water when they swim on the surface to the pressure they get when they swim in the depth of the pool. Learning activities were as follows:
Student's formed 9 groups. Each group filled their bottle with water and made a mark on where the surface was. One student lifted up the bottle and the other student's peeled off the tape completely.
Student's examined the water shower from each hole and sorted the distance from the closest to the furthest from the bottle
Student's measured the depth of the water by measuring the length of each hole from the surface mark.
Student's then measured hydrostatic pressure on each hole, with known water density of 1000 kg/m3, and then correlated the result with the data obtained from the water shower experiment done earlier.
Then the student's explained the meaning of hydrostatic pressure using the result of the previous experiments.
Finally, each group wrote down their work on colored paper and each group was asked to view the results of the other groups and a representative from each group wrote down their results on the blackboard.
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Closing
At the end of the lesson, Ms. Djuwita and her student's reflected on the lesson. And as a follow up activity homework was given to student's, which was to answer three hydrostatic problems.
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Sharing Innovation in Junior Secondary Education
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Edition 09 / February 2011
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