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Arrange college student in groups of five. Credit: Andrea LaRosaAt every table, offer each college student a different analog alien page. Hold the digital versions until later. There are five different alien drawings. Each group should have actually one of every of the five species of aliens. The students should not display their aliens to one another.After the students finish the analog round of drawings, offer each college student the digital variation of the very same alien they started with the very first time. Because that example, the college student who had “Quark” in the analog round should be provided “Quark” again in the digital round.

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Communication Signal Simulation college student Directions

We space going to simulate the sharing of a message over time and distance. This activity requires passing a record from human being to person, having each person replicate a illustration on it, then passing it onto the next human being at her table. Pass the file and replicating the drawing simulate the time and an are over which signals travel. In the an initial part that the activity, we’ll simulate analog signals. In the 2nd part, fine simulate digital.

Cut the document along the dotted line and also tape the 2 halves end to end.
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Student make one copy that the extraterrestrial image. Credit: Andrea LaRosaAfter the two minutes, wrinkles the original alien picture behind the file so that just your brand-new drawing have the right to be seen.
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Student-generated progression of alien drawings. Credit: Andrea LaRosa

Post task Questions

(Complete after ~ both analog & digital rounds)

Unfold your alien drawings and also observe the images drawn during the activity.

– Compare the original image to the last drawing. Identify and describe the similarities and differences between the 2 images.

– observe the development of illustrations during the activity. Identify and also describe what changed during each drawing.

Teacher Note: In the analog simulation round, students will observe exactly how tiny alters (distortions/noise) in every copy the the photo (signal) an outcome in far-ranging distortion in the final image after multiple transmissions.

Analog and Digital round Comparison

Compare the pictures from round 1 and also Round 2 activity.

– i beg your pardon round led to a more accurate final drawing? support your an option with proof from the activity.

Teacher Note: In the digital round simulation, the alien images are written of directly lines that follow the grids on the handout representing how digital signals space composed of quantized, or a minimal number that values. When students compare the photos theytransfer via analog and digital “signals,” they will notice that over there is little distortion in the digitally-transmitted image also after many transmissions, unlike what they observed when they sent the picture using an analog signal. 


In this activity, students will certainly familiarize us with features of digital and analog signals, and also apply their characterization to choosing digital or analog storage for a certain example.

Materials

— Scissors

— Digital & Analog card Sort

— intimidated Bird song Writing Prompt

— Claims-Evidence-Reasoning Rubric

Teacher set Up

Organize the college student into teams of three.Precut and also scramble a collection of cards because that each group.Share the CER Rubric through students.

Student Directions

Sort the images and also statements into two categories: Digital signals or Analog Signals.Use the sorted images and statements to overview your thinking as you complete the creating prompt.

Writing Prompt

Which form of signal would certainly you suggest to document a highly-detailed tune of an intimidated bird? assistance your selection with proof from her card sort. Use the Claims-Evidence-Reasoning (CER) Rubric to help guide your writing.


In this activity, we’ll usage binary coding to represent pathways with a collection of “high” and also “low” choices, which represent which course to take it on a reasonable map. Students will certainly act together digital-analog converters come decode binary pulses, and also to create a photo by transforming the pulses into colored pixels. 

The musictransfer to your car via satellite radio and also the information stored in data libraries space both digital signal that usage a binary system. In a binary system, over there are just two digits, 1 and also 0. The value or meaning of this digits have the right to vary. Because that example, they can represent “true” and “false,” “on” and also “off,” or “high” and “low.”

This graphic shows just how binary coding deserve to be used to represent pathways v a series of “high” and also “low” choices. Complying with the binary password will overview the course to take on a reasonable map, and aid in finding the to plan colors.

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A “1” will suggest to take the “high” path and a “0” will indicate the “low” path. V this map, dubbed a “logic gate map”, a binary collection of 0’s and 1’s can indicate when to “go high” or “go low”, conveying a path in the map come “code” because that a color. Because that example, using the reasonable map above, 010 would show “0” go down, “1” go up, “0” go down. This will code because that the shade green. 

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If you finished at black, you gained it! 

Digital signals space transmitted to computer systems in the form of digital signals sent as pulses. The digital maker interprets every pulse’s voltage together either a 0 or 1. The image listed below is an instance of a digitized wave.

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Using this graph, where the red lines on the top component represent a “1”, and also the red present on the bottom part represent a “0”, you deserve to see the the entire red heat represents the succession of 1s and also 0s follow me the optimal of the graph: 11001110111011.

If we were to usage each team of 3 numbers to uncover a corresponding shade on the table above, we would certainly use:

110 – pink011 – blue101 – red

Pixels Explained

Most electronic devices like smartphones, computers, and also television displays use liquid crystal display (LCD) technology. The screen is make of numerous tiny pieces called pixels. The electronic maker receives coded information, in the kind of digital signals, and also uses electrical power to manage the shade of the pixels. Each tiny pixel is simply transforming from one shade to the next depending on the electric signal, but due to the fact that the pixels room so tiny your eye detects activity in the as whole image. One amazing instance of this in nature, room the scales or “pixels” on a butterfly wing picture below and in this cool video. 

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The elaborate patterns on moth wings are composed of solitary cells the express the different colors. Credit: Wikimedia Commons.

How does The task Work?

Each student is assigned a digital wave graph like the one pictured below. Making use of the logic gate map, students will decode the signal into the pixel colors for part of the mosaic.

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Students will complete this table as they decode their colors. In this example, the colors decoded by college student #1 are presented in the top left corner. Credit: Andrea LaRosa
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The mural developed by the 4 classes is an s scene. Credit: Andrea LaRosa

Materials

— Meter stick

— Tape

— Legal dimension paper, cut in fifty percent lengthwise because that the grid labels

— student logic gate map and also student net tables

— Binary sequence graphs

— Eight 22×28 inch poster board (suggest using 2 per class):

— 2 x 2-inch Post-it stickies:

— 2 packs Post-it Super difficult Notes, 2 in x 2 in, Rio de Janeiro Collection

— 1 fill Post-it Super difficult Notes, 2 in x 2 in, Marrakesh Collection

— 1 pack Post-it Super sticky Notes, 2 in x 2 in, shining Neons

— keep in mind to educators: The packs above will make the complete mosaic with correct colors (154 Post-it stickies per poster board). If the Post-it stickies space not available, students can color in the grid v markers.

Preparation

Before the students develop their Post-it masterpiece, draw a 14 by 11 square grid on every poster board. The rows and columns will both be 2 inches large (the broad of her stickies). Tape the 2 poster boards with each other along the 28-inch political parties so the you produce a 22 x 11 grid.

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Print out the student binary sequences and also grid assignment tables. Reduced these sheets follow me the dotted lines and also give each student the assigned sequence and also corresponding network table. Her setup have to look choose this:

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Student Procedure

Decode: You will certainly decode 10-12 squares top top the grid. Below is an instance of a binary sequence graph. The red heat is a digital representation of a signal. Use your assigned signal graph and also the reasonable map come decode the binary sequence and color in your grid table. Inspect your answers with your teacher prior to moving onto mosaic construction.

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Construct: obtain the number and colors the Post-its because that your ar of the mosaic. Location your stickies ~ above the equivalent squares in the poster plank grid.

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Teacher Tip: produce a prelabeled poster plank to assist your students create the mosaic. Credit: Andrea LaRosa

Add the Post-its come the poster board grid in the correct order. As you do, think of every square top top the grid as a pixel, and also your color choice as a an outcome of the processing of the binary password to gain the appropriate color!