Podcast
Questions and Answers
How do mechanical waves transfer energy?
How do mechanical waves transfer energy?
- By altering the chemical composition of the medium, releasing stored energy.
- By creating a vacuum in the medium, pulling energy through the void.
- By vibrating the particles of the medium, which collide and transfer energy. (correct)
- By permanently moving the matter of the medium along with the wave.
What distinguishes transverse waves from longitudinal waves?
What distinguishes transverse waves from longitudinal waves?
- Longitudinal waves can travel through a vacuum, unlike transverse waves.
- Transverse waves require a denser medium than longitudinal waves.
- Only transverse waves are affected by gravity.
- The direction of particle vibration relative to the direction of wave travel. (correct)
Which of the following scenarios best demonstrates wave reflection?
Which of the following scenarios best demonstrates wave reflection?
- A wave continuing into a new medium.
- A wave bending as it passes from air into water.
- A wave bouncing off a hard surface, changing direction. (correct)
- A wave dissipating as it moves through a dense material.
How does the frequency of a wave relate to its pitch?
How does the frequency of a wave relate to its pitch?
Why do lower-pitched sounds travel more clearly through walls than higher-pitched sounds?
Why do lower-pitched sounds travel more clearly through walls than higher-pitched sounds?
What happens to a wave's energy when the wave is absorbed by a medium?
What happens to a wave's energy when the wave is absorbed by a medium?
In the context of mechanical waves, what is a 'medium'?
In the context of mechanical waves, what is a 'medium'?
If a sound wave travels from air into water, what two processes can occur at the boundary between the two media?
If a sound wave travels from air into water, what two processes can occur at the boundary between the two media?
How do engineers utilize the reflection of mechanical waves to map the sea floor?
How do engineers utilize the reflection of mechanical waves to map the sea floor?
Why does the amplitude of a wave decrease as it travels farther from its source?
Why does the amplitude of a wave decrease as it travels farther from its source?
In what way is the use of ultrasound in medicine similar to the mapping of the sea floor using sound waves?
In what way is the use of ultrasound in medicine similar to the mapping of the sea floor using sound waves?
What is the role of a gel in medical ultrasounds?
What is the role of a gel in medical ultrasounds?
A wave is traveling through a medium and encounters a boundary with a different medium. Which properties of the wave will remain unchanged?
A wave is traveling through a medium and encounters a boundary with a different medium. Which properties of the wave will remain unchanged?
If an engineer is designing a soundproof room, what wave properties should they primarily consider?
If an engineer is designing a soundproof room, what wave properties should they primarily consider?
Why are sounds quieter farther away from their source?
Why are sounds quieter farther away from their source?
What do dolphins use to locate objects?
What do dolphins use to locate objects?
What causes the energy of the original wave to split between the two?
What causes the energy of the original wave to split between the two?
Why can scientists learn about the surface a mechanical wave reflects off of?
Why can scientists learn about the surface a mechanical wave reflects off of?
How do scientist know about earthquakes affect on the Earth?
How do scientist know about earthquakes affect on the Earth?
What are tsunamis caused by?
What are tsunamis caused by?
Of the following options, what can waves travel through?
Of the following options, what can waves travel through?
What is the relationship between energy and amplitude?
What is the relationship between energy and amplitude?
In sounds, what can high energy in a wave be related to?
In sounds, what can high energy in a wave be related to?
How does the movement of a transverse waves related to its energy?
How does the movement of a transverse waves related to its energy?
What can engineers use to eliminate to make areas sound proof?
What can engineers use to eliminate to make areas sound proof?
Flashcards
Wave
Wave
A disturbance that carries energy from one place to another without permanently moving matter.
Medium
Medium
Material through which the energy of a wave moves.
Mechanical wave
Mechanical wave
Wave that travels through a medium due to the motion of matter.
Transverse wave
Transverse wave
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Longitudinal wave
Longitudinal wave
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Amplitude
Amplitude
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Wavelength
Wavelength
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Frequency
Frequency
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Wave speed
Wave speed
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Reflection
Reflection
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Transmission
Transmission
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Absorption
Absorption
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Pitch
Pitch
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Volume
Volume
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Sound Wave
Sound Wave
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Study Notes
The Behavior of Mechanical Waves
- Learning experiences in this lesson prepare students for mastery of MS-PS4-1 and MS-PS4-2.
- MS-PS4-1 involves using mathematical representations to describe a simple model for waves, including how amplitude relates to energy.
- MS-PS4-2 involves developing and using a model to describe how waves are reflected, absorbed, or transmitted through various materials.
Science & Engineering Practices
- Mathematical representations can describe/support scientific conclusions and designs (MS-PS4-1).
- Models can describe phenomena (MS-PS4-2).
- Science knowledge is based on logical and conceptual connections between evidence and explanations (MS-PS4-1).
- A video is available using data, mathematical thinking, and computational thinking.
- Another video is available for developing and using models.
Disciplinary Core Ideas
- A sound wave requires a medium for transmission (MS-PS4-2).
Crosscutting Concepts
- Graphs/charts identify data patterns (MS-PS4-1).
- Structures are designed for specific functions, considering material properties and shaping (MS-PS4-2).
- A video is available on Structure and Function.
Connection to Math
- Reason quantitatively (MP.2).
- Model with math (MP.4).
- Understand ratio concepts and use ratio language (6.RP.A.1).
- Solve real-world math problems using ratio and rate reasoning (6.RP.A.3).
- Represent proportional relationships (7.RP.A.2).
- Understand and interpret linear functions (8.F.A.3).
- Utilize ratios, proportional relationships, and functions.
Connection to English Language Arts
- Integrate multimedia/visual displays to clarify information, strengthen claims/evidence, and add interest (SL.8.5).
Integrating the Three Dimensions of Learning
- Models of the sea floor are examined, created by measuring mechanical waves' movement through water (SEP Developing and Using Models).
- Evidence is gathered on how mechanical waves need media to travel (CCC Structure and Function).
- The impact of media and matter states on sound speed waves is explored (DCI PS4.A-2 Wave Properties, SEP Using Mathematics and Computational Thinking, CCC Patterns).
- The energy carried by mechanical waves and its dispersion upon hitting a media boundary are analyzed (SEP Developing and Using Models, CCC Patterns).
Content Background: Mechanical Waves
- Two movement types exist; the medium's particles vibrations and the wave's energy, transferred via particle collisions.
- Comparing particle vibration direction with wave travel direction categorizes mechanical waves.
- Transverse waves feature particles moving perpendicular to the wave.
- Longitudinal waves feature particles moving parallel to the wave.
Content Background: Measurable Wave Features
- Features distinguishing waves can be measured.
- Amplitude is the distance from a particle's starting position to its max displacement.
- Wavelength is the distance between similar points on adjacent waves.
- Frequency is how often medium particles vibrate per time unit.
- Wave speed is the distance a point on a wave travels per time unit.
- Wave speed remains constant within a medium.
- Waves may encounter a new medium.
Content Background: Wave Interactions
- Waves can reflect back or transmit through a new medium.
- A wave can be partially transmitted and reflected at a media boundary, splitting into two new waves.
Differentiate Instruction: Reinforcing Vocabulary
- Description wheels can help students remember vocab.
- Vocabulary goes in a circle, terms, examples and drawings fill the spaces surrounding.
Build on Prior Knowledge
- Students require existing knowledge of a wave repeating pattern, specific wavelength/frequency, and amplitude.
- Waves transfer energy.
- Cause-and-effect relationships predict natural phenomena.
Engage: Lesson Phenomenon
- In Lesson 1, students learned that waves carry energy but not matter, and repeat.
- Lesson 2 furthers develops models from Lesson 1 to explain the behavior of mechanical waves.
- Students explain how the behavior of mechanical waves corresponds to properties of waves.
- Information is gathered through the lesson about the waves, and students can explain how waves can be used to create maps of the sea floor.
Explore: Can you explain it?
- A question is posed as to how the sea floor can be mapped using mechanical waves.
- In response, students will note the distance a sound wave travels, if the sea floor is hard or soft and the time it takes for the return echo of waves bouncing off the sea floor.
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