Objective: To identify whether positive, negative, or zero work is being done, to identify the force that is doing the work, and to describe the energy transformation associated with such work.
You are NOT using this Activity as a Logged-in student. You may log in and return to this page. Or you can do this Activity as a Guest. If you continue as a Guest, a record of completing it will NOT be stored in our database.
This is the Teacher Preview mode of this Science Reasoning task.
Teacher Preview allows teachers to preview the Questions for each Activity and their organization into Question Groups. This allows you to evaluate the appropriateness of the Activity for your students. Teacher Preview also allows you to consider whether you would like to customize the task by removing one or more of the Activities from the assignment. Customization can be done within Task Tracker when you assign the task to your class.
You are currently logged in with the username shown below. As long as you maintain an internet connection, any of the parts of this Activity that you complete will be saved in your account.
Tap on the Start Button to begin.
The Sound of Music
Start Teacher Preview Mode
Use Key Pad to Enter Name. Then Tap the Enter Button.
Identify general trends associated with the harmonic number, the frequency, the wavelength, and the speed for open- and closed-end air columns.
Analyze a frequency spectrum to make claims regarding frequency ratios, wavelength ratios, and the type of air column.
Wizard Difficulty Level
Compare open-and closed-end air columns in terms of their frequency, wavelength, and wavelength-length relationship.
Apprentice Difficulty Level
Master Difficulty Level
No, Stay Here
Each Science Reasoning task is based on a passage or story that presents data and information or describes an experiment or phenomenon. Students must combine an understanding of science content and science reasoning skills (science practices) to answer questions about the passage or story.
Tap anywhere to view the passage.
Currently Displaying ...
Some Interactivity and Check Answer functionality is disabled when in Teacher Preview mode.
Tap to View Information:
This is the last Activity
in this task.
The Sound of Music
The sound of many musical instruments is the result of vibrations resonating within a column of air. There are two types of air columns – referred to as closed-end and open-end air columns. The difference depends on whether one or both ends of the column are open to the surroundings.
Any column of air has a set of frequencies at which its particles naturally vibrate. These frequencies are called harmonics; their values depend on the length of the air column. The lowest frequency in the set is known as the first harmonic. Other frequencies in the set are whole number multiples of the lowest frequency. The mathematical relationship between the wavelength (λ), frequency (f), and speed (v) for the various harmonics is very predictable. Table 1 illustrates these relationships for a 60-cm long closed-end air column. Table 2 illustrates these same relationships for a 60-cm long open-end air column.
When a musical instrument is played, air particles immediately begin to vibrate with a set of many frequencies. These frequencies combine to produce the sound that we hear. Some of the frequencies within the set quickly dissipate and do not affect the overall sound. Others are sustained over time and become the prominent frequencies that affect the sound. These enduring frequencies are the harmonic frequencies. Two different instruments can play the same note yet sound quite different. A computer analysis of the sound reveals that instruments differ in terms of the relative strength of the various harmonics. A frequency spectrum shows the specific frequencies within the sound and their relative intensity or amplitude. Frequency spectra for a clarinet and a flute playing the note C4 are shown in Figure 1.
This is the last QG
of the last Activity.
Learn More About Task Tracker and Teacher Preview.
This is the last Question
of the last Activity.
Scroll to View Whole Passage. Tap to Close.
If you return to the Main Menu, then you will lose all your progress
on this activity.
Are you sure you want to return to the Main Menu?
Template Version 1.2 Added Question Scene 4 for Table Completion