Asia-Pacific Forum on Science Learning and Teaching, Volume 16, Issue 1, Article 16 (Jun., 2015) Necati HIRÇA Developing a constructivist proposal for primary teachers to teach science process skills: “Extended” simple science experiments (ESSE) Previous Contents

Appendix B: Student Worksheet

Please answer the question: “can the opera singer break a glass using her voice”

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• What is your hypothesize whether the opera singer break a glass by her voice?

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• Take the lentils, lay the speaker down and put the lentils on it and to switch on the volume on PC. What do you observe? (What is dependent variable)

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• What is the cause of jumping of lentils? (what is independent variables).

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• Turn up volume on PC and observe the effect of changing volume on moving lentils. Write your observation (Describe relationships between dependent and independent variables).

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• When you turn up volume gradually, measure highest altitude of lentil and write your findings in the data table in below. Repeat this process five times for accurate results.

Volume	Altitude of Lentils
	trial 1	trial 2	trial 3	Average (cm)
20
40
60
80
100

• Draw your graphic according to your data. (Open spreadsheet software. Copy and paste your results on spreadsheet. Use “a scatter (X-Y)” graphic and choose the version which shows points and connects them by smoothed lines.)

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• What do you understand from the data table and graph? (Describe the effect of independent variable on dependent variable.)

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• Give an example of levitating and moving object by sound? Can we use the effect of sound in technology?

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• Which types of energy have you learned in this experiment?

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• How is sound produced? (please use energy conservation)

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