Week 4 - Behavior of Mechanical Wave - Sound Interaction PDF

MODULE L: WAVES AND THEIR APPLICATIONS UNIT 1: Waves Day 1- Objectives: ▶ Draw a mechanical wave ▶ Explain the relationship between frequency and wavelength in a wave ▶ Investigate energy of wave on spring Starter: What is the difference between the waves in the picture?  Group work...

MODULE L: WAVES AND THEIR APPLICATIONS UNIT 1: Waves Day 1- Objectives: ▶ Draw a mechanical wave ▶ Explain the relationship between frequency and wavelength in a wave ▶ Investigate energy of wave on spring Starter: What is the difference between the waves in the picture?  Group work activity Instructions: Each group will discuss, and answer activity sheet given by the teacher. Students will share and calculate the speed waves. Each group will use one device to simulate a wave on spring. Students will share answers and teacher will give feedback. All questions should be answered, and papers returned to teacher. Exit ticket https://quizizz.com/join?gc=696858 DAY 2 - LESSON 2: THE BEHAVIOR OF MECHANICAL WAVES ► MS-PS4-1 Use mathematical representations to describe a simple model for waves that includes how the amplitude of waves is related to the energy in a wave ► Standards: ► MS-PS4-2 Develop and use a model to describe that waves are reflected, absorbed, or transmitted through various materials ► Objectives ∙ Define a sound wave ∙ Identify the meaning of loudness ∙ Describe pitch ∙ Explain how particles of a medium behave when a wave passes them. ∙ Compare between speed of sound waves transferred through gas, liquid, and solid. ► Vocabularies ► Sound wave ► Loudness ► Pitch  A_________________ STARTER B_________________ C_________________ ► Label the following D________________  THE BEHAVIOR OF MECHANICAL WAVE-SOUND WAVE ► When you shout at your friend across the room, sound waves carry energy through the air ► Your friend senses that energy when he or she hears your voice ► The air (medium) does not move from your vocal cords to your friend’s ear; however, the sound wave move through the air, causing the air particles to vibrate as the energy passes through them. ► What happens when you talk and touch your vocal cord?  Define sound waves using your own words. Remember: What is a sound wave? ▶ A longitudinal mechanical wave caused by the vibration of medium’s particles as the wave travels through a medium. C C C C C R R R R C C C C C R R R R  CHECK YOUR UNDERSTANDING Think-Pair-share ▶ Where do you think sound travels faster? Explain. (In solid, Liquid, or air)  SOUND WAVE, ITS MEDIA AND SPEED ► Sound travel fastest in solid medium than liquid medium, and in liquid medium than air. Why? Particles are Particles are Particles are so far apart, move in Tightly Loosely all directions Packed & packed, flow Vibrate one another  Checking understanding: Page: 38 Page: 39 The waves cause the particles of medium to vibrate and move up and down or back and forth. ▶ Day 3 – Loudness and Pitch, Objectives: ∙ Identify the meaning of loudness and pitch ∙ Explain the relation ship between loudness and energy, frequency and pitch ∙ Classify sounds as loud/soft or high/low pitch ∙ Compare and contrast loud/soft sounds and high/low pitched sound from a given wave  Test the sound of different materials. Which makes loud, soft, shrill or deep sound? Teacher will have different solid materials to test their sounds. Properties of sound ► Click the link below to watch a video on properties of sound https://www.youtube.com/watch?v=ZTsLLBo8lNQ  Loudness Pitch ▶ Instructions: ▶ Search the meaning of the two words During presentation – Other groups ▶ Discuss with your friends - listen ▶ Write what you understand Rate the group presentation out of 10 ▶ Present to your classmates ▶ Draw waves with different properties Practice high and low pitch, loud and soft sounds https://javalab.org/en/sound_wave_en/ GROUP WORK-collaborative learning  PROPERTIES OF SOUND ► Loudness- is related to the volume of a sound and is directly related to the amplitude of the sound ► If two sounds are identical except for the amplitude, the sound with the higher amplitude will sound louder ► Pitch – is how high or low a sound is, is directly related to frequency ► If you hear a high-pitched buzz, it means the sound waves reaching your ear have a high frequency Plenary https://edpuzzle.com/assignments/66e93add8b38a2 363a35f001/watch  Day 4 - Reteach with activities ► Vocabularies ► Sound wave ► Loudness ► Pitch REFRESHMENT- STARTER Label the waves below as - A loud, high-pitched sound - A soft, high-pitched sound -A Loud low-pitched sound -A Soft, low-pitched sound Copybook activity: Draw the following waves: 1- Loud, high-pitched wave. 2- Loud, low-pitched wave. 3- Soft, high-pitched wave. 4- Soft, low-pitched wave. Compare and contrast the waves. CHECK YOUR UNDERSTANDING ▶ Describe how sound wave transfer energy ▶ Label the following using the terms in the box Loud sound Soft sound Low pitched high pitched GROUP ACTIVITY- PICH AND LOUDNESS Instruction ▶ Each student will record her / his voice ▶ Make a loud voice and soft voice ▶ Draw your observation on your copy book ▶ Make a high and low-pitched sound ▶ Draw your observation on the copybook Group ACTIVITY: IS IT HIGH OR LOW SOUND? ▶ Write your answer on a separate paper as you listen the sounds in the video ▶ Click the link below to watch the video https://www.youtube.com/watch?v=V9yp99xGP6s&t=4s  Extended ACTIVITY-QUIZIZZ ▶ https://quizizz.com/join?gc=67176853