Arrange students in teams of five. Credit: Andrea LaRosaAt each table, give each student a various analog alien page. Host the digital versions till later. There space five different alien drawings. Each team should have actually one of each of the five types of aliens. The students have to not show their aliens to one another.After the students complete the analog ring of drawings, give each college student the digital variation of the very same alien they started with the an initial time. Because that example, the college student who had actually “Quark” in the analog round need to be provided “Quark” again in the digital round.

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Communication Signal Simulation college student Directions

We are going come simulate the sharing of a message over time and distance. This task requires happen a record from person to person, having actually each human replicate a illustration on it, then passing that onto the next human at your table. Passing the document and replicating the illustration simulate the moment and an are over which signals travel. In the first part that the activity, fine simulate analog signals. In the second part, we’ll simulate digital.

Cut the record along the dotted line and tape the 2 halves end to end.
Student do one copy that the alien image. Credit: Andrea LaRosaAfter the 2 minutes, fold the original alien picture behind the paper so that just your new drawing can be seen.
Student-generated development of extraterrestrial drawings. Credit: Andrea LaRosa

Post task Questions

(Complete after both analog & digital rounds)

Unfold her alien drawings and observe the images attracted during the activity.

– Compare the original photo to the final drawing. Identify and also describe the similarities and differences in between the two images.

– watch the progression of illustrations during the activity. Identify and describe what readjusted during each drawing.

Teacher Note: In the analog simulation round, students will certainly observe how tiny transforms (distortions/noise) in each copy that the picture (signal) result in significant distortion in the last image ~ multiple transmissions.

Analog and also Digital ring Comparison

Compare the photos from ring 1 and also Round 2 activity.

– i m sorry round resulted in a much more accurate last drawing? support your an option with proof from the activity.

Teacher Note: In the digital ring simulation, the alien photos are composed of straight lines the follow the grids on the handout representing how digital signals room composed of quantized, or a restricted number the values. When students compare the pictures theytransfer via analog and digital “signals,” lock will notification that there is tiny distortion in the digitally-transmitted image even after many transmissions, uneven what lock observed when they transmitted the image using an analog signal. 

In this activity, students will certainly familiarize themselves with features of digital and also analog signals, and also apply your characterization to picking digital or analog storage because that a certain example.


— Scissors

— Digital & Analog card Sort

— endangered Bird tune Writing Prompt

— Claims-Evidence-Reasoning Rubric

Teacher set Up

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

Student Directions

Sort the images and also statements right into two categories: Digital signal or Analog Signals.Use the sorted images and statements to guide your thinking as you complete the composing prompt.

Writing Prompt

Which type of signal would certainly you suggest to record a highly-detailed track of an threatened bird? assistance your an option with proof from your card sort. Use the Claims-Evidence-Reasoning (CER) Rubric to help guide her writing.

In this activity, we’ll usage binary coding to stand for pathways with a series of “high” and also “low” choices, which represent which path to take on a logic map. Students will act as digital-analog converters to decode binary pulses, and also to develop a picture by transforming the pulses into colored pixels. 

The musictransfer come your automobile via satellite radio and also the information stored in data libraries room both digital signal that use a binary system. In a binary system, over there are only two digits, 1 and also 0. The worth or definition of these digits deserve to vary. For example, they deserve to represent “true” and “false,” “on” and also “off,” or “high” and also “low.”

This graphics shows exactly how binary coding deserve to be supplied to represent pathways with a series of “high” and “low” choices. Adhering to the binary code will guide the route to take it on a reasonable map, and aid in finding the to plan colors.


A “1” will suggest to take it the “high” path and also a “0” will suggest the “low” path. V this map, referred to as a “logic gate map”, a binary collection of 0’s and 1’s can indicate as soon as to “go high” or “go low”, conveying a course in the map come “code” for a color. For example, making use of the logic map above, 010 would show “0” go down, “1” walk up, “0” go down. This will code for the color green. 


If you finished at black, you got it! 

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


Using this graph, whereby the red lines on the top part represent a “1”, and also the red currently on the bottom component represent a “0”, you deserve to see that the whole red line represents the succession of 1s and 0s along the top of the graph: 11001110111011.

If us were to usage each group of three numbers to uncover a corresponding color on the table above, we would use:

110 – pink011 – blue101 – red

Pixels Explained

Most electronic devices like smartphones, computers, and television screens use fluid crystal screen (LCD) technology. The display is made of numerous tiny pieces referred to as pixels. The electronic machine receives coded information, in the type of digital signals, and uses electrical energy to regulate the color of the pixels. Each tiny pixel is simply changing from one color to the next depending upon the electric signal, but due to the fact that the pixels are so tiny your eye detects motion in the as whole image. One amazing instance of this in nature, space the scales or “pixels” ~ above a butterfly wing photo below and in this cool video. 

The intricate patterns top top moth wings are composed of single cells the express the different colors. Credit: Wikimedia Commons.

How go The activity Work?

Each college student is assigned a digital wave graph choose the one pictured below. Using the logic gate map, students will decode the signal into the pixel colour for component of the mosaic.

Students will finish this table together they decode their colors. In this example, the colour decoded by student #1 are displayed in the peak left corner. Credit: Andrea LaRosa
The mural developed by the 4 classes is an ocean scene. Credit: Andrea LaRosa


— Meter stick

— Tape

— Legal dimension paper, reduced in half lengthwise for the grid labels

— college student logic door map and also student grid tables

— Binary succession graphs

— Eight 22×28 customs poster plank (suggest using 2 per class):

— 2 x 2-inch Post-it stickies:

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

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

— 1 load Post-it Super difficult Notes, 2 in x 2 in, bright Neons

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


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


Print the end the college student binary sequences and grid assignment tables. Reduced these sheets follow me the dotted lines and give each student the assigned sequence and also corresponding network table. Your setup should look like this:


Student Procedure

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

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Construct: acquire the number and also colors that Post-its because that your section of the mosaic. Location your stickies onto the corresponding squares in the poster plank grid.

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

Add the Post-its to the poster board grid in the exactly order. As you do, think of every square ~ above the grid as a pixel, and your color selection as a an outcome of the handling of the binary password to acquire the ideal color!