Lesson Plan : Producing Sound

Teacher Name:
 Ashok P
 Grade 7-8

 Sound is a form of energy. it is produced by vibrating bodies. Sound is a form of wave. The keywords in this chapter includes Wave - Longitudinal & Transverse Amplitude Frequency Time-period Wavelength Velocity Free Vibrations Forced Vibrations Resonance Reverberation
 Realize the characteristics of mechanical wave motion. Observe the meaning of Velocity = Frequency X Wavelength
 Acquisition of knowledge. Development of intellectual abilities and skills. To develop critical thinking and problem solving.
 Daily-life experiences; kit items; Rulers; bobs; tumblers; speakers; etc. A powerpoint presentation for the topic on transverse wave motion.
 Demonstration method
 First the information is imparted and then an experiment is performed to reinforce the concept.
 Guided activity for demonstrating that 1. vibrating objects can produce sounds 2.the faster an object vibrates, the higher the sound or pitch 3.the slower an objective vibrates,the lower the sound or pitch Another activity is designed to 1) Identify the frequency, amplitude and phase of a wave. 2) Identify and explain the difference between a transverse and longitudinal wave. 3) Relate the concept of vibration to frequency and pitch.
Checking For Understanding:
 Reporters from each group will report the discoveries each group made. The teacher will record these observations on the blackboard. The group will summarize their results and come to a consensus with regard to their observations.
 Students will be able to define, label and demonstrate the following vocabulary words: wave, wave motion, longitudinal wave, transverse wave, pulse, crest, energy trough, amplitude, frequency, reflection, rarefaction, refraction and compression. Students will be able to tell the essential difference between a longitudinal and a transverse wave. Students will be able to understand that a wave is a means of transmitting energy.
 Evaluation is based on 1. personal interviews of individuals or small groups 2. performance in the worksheets supplied 3. functional understanding of concepts, principles etc. 4. problem solving skills 5. open mindedness

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