Energy of Waves - Updated

Carrie Latesky
Birch Run, MI

Understanding By Design

Unit Design

For 
 

Energy of Waves 
 
 

Developed by

Lori Hall & Carrie Latesky

Updated 2007-2008

Carrie Latesky 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

The Logic of Backward Design 
 
 

Understanding By Design

Unit Design Worksheet 

Unit Title:  The Energy of  Waves   Subject/Course:  Science Topic:  Waves Grade(s):  7 Staff Name:  Carrie Latesky

 

Stage 1 - Desired Results Established Goals: Explain how mechanical waves transfer energy.  (IV.4.6) Describe the motion of vibrating objects.  (IV.4.5) Understandings: Students will understand that... A wave is a disturbance that transmits energy. The particles of a medium do not travel with the wave. Mechanical waves require a medium, but electromagnetic waves do not. Amplitude is the maximum distance the particles of a medium vibrate from their rest position. Wavelength is the distance between two adjacent corresponding parts of a wave. Frequency is the number of waves that pass a given point in a given amount of time. Wave speed can be calculated by multiplying the wave’s wavelength by the frequency. Refraction is the bending of a wave when it passes through different media. Essential Questions: How may the motion of vibrating objects be described by frequency, period and amplitude? How do mechanical waves transfer energy? How is energy transferred through a medium?     Students will know... Particles in a transverse wave vibrate perpendicularly to the direction the wave travels. Particles in a longitudinal wave vibrate parallel to the direction that the wave travels. Waves reflect after hitting a barrier. Waves bend around barriers or through openings during diffraction. The result of two or more waves overlapping is called interference. Amplitude increases during constructive interference and decreases during destructive interference. Resonance occurs when a vibrating object causes another object to vibrate at one of its resonant frequencies. Students will be able to...  Describe how waves transfer energy without transferring matter. Distinguish between waves that require a medium and waves that do not. Explain the difference between transverse and longitudinal waves. Identify and describe four wave properties. Explain how frequency and wavelength are related to the speed of a wave. Describe reflection, refraction, diffraction and interference. Describe resonance and give some examples. Stage 2 - Assessment Evidence Performance Tasks: (Summary in GRASPS form)  Unit Test on Waves, R.A.F.T.  Key Criteria:  A=99+   B=98-86  C=85-77  D=76-66  Other Evidence:  Observations, Student-Teacher Dialog (oral defense), work samples, lab reports

 
 
 
 

Name ________________________________ Date __________________ Due Date ________  The Energy of Waves  Late work will be assigned 50% of the assignment value.  If you must be absent on the due date, make arrangements with your teacher before then, or ask someone to turn it in for you on the due date.  Directions—Examine the possible activities you can do to learn the unit objectives.  Each assignment has a point value based on the amount of time and effort necessary to complete the task.  Items marked in bold are required assignments.  If you have questions, ASK!    Total points available:  A= 99+  B= 98-86, C= 85-77, D=76-66  5 pts (apply to C Layer):  PARENT SIGNATURE:  ________________________________________________________                                                                           EMAIL/PHONE________________________________________________________________________  Text:  Holt Science and Technology, Short Course O:  Sound and Light    C Layer: Maximum 80 points _____ Energetic Waves (Motivator Activity pg. 3) 5 points Tie one end of a piece of rope to the back of a chair.  Hold the other end in one hand, and stand away from the chair so that the rope is almost straight but is not pulled tight.  Move the rope up and down quickly to create a wave.  Repeat this step several times.  What are your observations?  In which direction does the wave move?  How does the movement of the rope compare with the movement of the wave?  Where does the energy from the wave come from?   _____ Class Notes 5 points for each day  Day1   Day 2   Day 3     Select Three from the following (One from each group)  GROUP #1_____ The Nature of Waves Directed Reading  (worksheet pgs. 4-9)  10 points                      -or-                    _____ Section Reviews  (page 9)  10 points    GROUP #2_____ Properties of Waves Directed Reading  (worksheet pgs. 10-13)  10 points                     -or-                    _____ Section Reviews  (page 13)  10 points  GROUP #3_____ Wave Interactions Directed Reading (worksheet pgs. 14-19)  10 points                     -or-                   _____ Section Reviews  (page 19)  10 points                                          Choose & complete one of the following:  _____ Vocabulary Chart 15 points Your chart must include all 14 terms.  Term Definition Example/Picture  Wave      Medium      Transverse Wave      Longitudinal Wave      Amplitude      Wavelength      Frequency      Wave Speed      Reflection      Refraction      Diffraction      Interference      Standing Wave      Mechanical Wave

Choose & complete one of  the following:    _____ Vocabulary Chart  15 points  Your chart must include all 14 terms.  Term Definition Sentence Example/Picture  Wave        Medium        Transverse Wave        Longitudinal Wave        Amplitude        Wavelength        Frequency        Wave Speed        Reflection        Refraction        Diffraction        Interference        Standing Wave        Mechanical Wave              _____ Vocabulary Flash Cards  15 points Create a pair of flash cards for each of the terms listed above.  Word on one card, a definition or picture on the second.  Play 3 matches of concentration with 3 different people.  You must get a signature from each opponent.    Choose & complete one of the following:  _____ Internet Activity  5 points Do Internet Activity on page 7.  Answer the questions completely.  _____ SciLinks Activity:  The nature of waves  5 points Investigate the nature of waves using the keyword HSM1017.  Complete the worksheet from the teacher.    _____ Figure 1 (page 4)  5 points Imagine you are on the leaf shown in Figure 1.  Describe your motions.  How could you get to shore?  Would the waves carry you to shore?   _____ Constructing a Transverse Wave  5 points  (pg.11) Use yarn and tape to construct a transverse wave on a piece of construction paper. Create another transverse wave below the first but increase the amplitude of the wave while keeping it’s frequency constant. Explain what increasing the amplitude represents. Construct another wave but change the frequency. What happened to the wavelength when the frequency was changed? _____ Standardized Test Prep  5 points Complete the Standardized Test Prep on pages 24 & 25 _____ Interpreting Graphics  5 points  Use the diagram of waves a. b. and c. in question #18 on page 23 to answer the following questions: Which wave has the longest period?  How did you know? Which wave has the greatest amplitude?  How did you know? Which wave has the highest frequency?  How did you know? Which wave has the highest pitched sound?  How did you know? _____ Crossword Puzzle  10 points Create a crossword puzzle using all 14 chapter vocabulary words.  The puzzle must contain a clue for each term.  An answer key must be provided.  _____ Concept Map  (pg. 23)  10 points Design a blank concept map using the terms provided in problem #13 on page 23.  Provide an answer key.

B Layer—20 points to move to A Layer _____ Pitch of a Rubber band 10 points (pg.10) Pluck a rubber band so that it makes a tone.  Change the length of the rubber band so that the tone changes pitch.  Explain what caused the pitch change.   _____ Wave Examples 10 points (pg.8) Reconstruct the following chart and complete it for 10 examples of waves that you can find in everyday life. Example of Wave What makes it a wave? Transverse, Longitudinal or Surface Wave?  1. 2. 3…        _____ Musical Instrument 20 points Using a shoebox and 3 to 4 rubber bands, design and build a musical instrument. 10 pts.  Play a recognizable song.   _____ Waves are Child’s Play  10 points Find a child’s toy that makes sound.  Investigate the differences in pitch and loudness and how they can be changed.  Present your findings to the class.  _____ Skills Practice Lab 20 points Complete the Skills Practice Lab on pages 20-21.  _____ Research Resonance  10 points (pg.18) Conduct research to learn how resonance affects the sounds produced by different musical instruments.  Share your results by writing a report, by making a poster, or by playing a musical instrument.   _____ Career Research  10 points (pg.11) Research examples of jobs where a person would need to figure out amplitude, wavelength, frequency, or wave speed.  Report your findings in an informational poster to be shared with the class.  _____ Power Point  10 points Design a presentation that informs the viewer of the following things:  What a wave is, the different part of a wave, describe the differences between a transverse wave and a longitudinal wave, identify and describe four wave properties.  _____ Skit 10 points Along with 2 or 3 of your classmates, demonstrate the properties of a longitudinal wave and a transverse wave, be creative, and use props.    _____ Study Guide Review 10 points

Layer A  _____ R.A.F.T.  20 points    1. President Earthquake Survivor Letter of support Waves affect us all  2.  Middle School Student Space Aliens Poem Medium is not just a size  3.  Boss Someone newly hired An important email There’s a difference between constructive & destructive interference  4.  Surfer 6:00 Newscast Audience A news story Timing is everything  5. Storyteller Middle School student Comic Strip Not all waves are the same  6. Sound wave Other sound waves Obituary We can’t last forever  7. Wave Medium Classified Ad I need you  8. Paula Abdul American Idol Contestant Try out criticism Work on your waves  9. Teacher Student Worksheet (with answer sheet) Transverse and Longitudinal wave similarities & differences  10. Fishing Boat Dock Postcard Motion of the Ocean                                                        All students will complete the Waves and Vibrations Test for a possible 30 points.  Students will also be expected to orally defend vocabulary and main topics they learned in this unit.

Understanding By Design

Unit Design Worksheet 

Essential Vocabulary Mechanical Waves-wave that must have a medium to travel through. Wavelength-the distance from any point on a wave to an identical point on the next wave. Amplitude-the maximum distance that the particles of a wave’s medium vibrate from their rest position. Frequency-the number of waves produced in a given amount of time. Speed-the speed at which a wave travels through a medium. Transverse Waves-a wave in which the particles of the medium move perpendicularly to the direction the wave is traveling. Longitudinal/compressional waves-a wave in which the particles of the medium vibrate parallel to the direction of wave motion.          Sequencing the Learning Day 1  Motivation Activity Energetic Waves Pgs.3-9  Explanation of Unit Section 1 Notes  *Entire class participates Day 2 The Nature of Waves Pg.4-9   Section 1 Directed Reading or Section Review Individual work Day 3  Level C work day Students work individually Day 4 Properties of Waves  Pgs.10-13 Section 2  Notes Individual work or notes Day 5 Directed Reading or Section Review Level C work day Students work individually Day 6  Wave Interactions Pgs.14-19  Section 3 Notes  Individual work or notes  Day 7 Lab prep material accessible Level C/B work day Directed Reading or Section Review Individual or lab work Day 8 Level C/B work day    Individual or lab work Day 9 Level C/B work day  Computer Access Individual or lab work Day 10 Level C/B/A  Computer Access Individual or lab work Day 11 Level A work day  Individual work        Day 12 Review Entire class participation (Jeopardy Game) Day 13 Unit Test All unit work is due Entire class participation Day 14 Friday

 
 

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