Electronic Worksheet

Our electronic worksheet explains input, output, and signal processing units. Don't worry, it's not hard to grasp.

electronic worksheet

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MatchCard Science Electronic Worksheet

Objective: Describe the three major parts of an electronic system.

MatchCard: Download below.

MatchCard Information Pieces identify, describe, and give examples of input, output, and signal processing units.

Print the Types of Electronics MatchCard

Electronics Worksheet homeschool curriculum download arrow
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This is MatchCard #3 of the Technology Unit Study. Find more information on MatchCard Science below.

Opening Activity: Input and Output

This activity works best with one leader and three kids, though it can be adapted for any number.

Step 1 Written to Verbal

Write the word "heart" on a piece of paper. Show it to Student #1. Student 1 whispers it to Student #2.

Example 2: Verbal to Diagram

Student #2 draws a diagram of a heart after they hear the word from Student 1. Then Student 2 shows their diagram to Student #3.

Step 3: Diagram to Written Word

Student #3 writes the word of the diagram they were shown. Then show that the two written words are both "heart".


In this activity each student had an “input” and an “output.” Discuss what those inputs and outputs were.

3 Parts of Electronics


electronic input

Takes signals from the physical world and converts them to different signals.

Signals may be temperature, electrical, or pressure.


Signal Processing Unit: SPU

electronic output

The Signal Processing Unit amplifies, interprets, and changes signals.

Signals may be analog or digital.

The Signal Processing Unit (SPU) converts the input signal into the output signal. What was the SPU of your heart activity? The students’ brains processed the input and constructed an output. Every piece of electronic equipment needs “brains” to do its work.


Analog signals are continuous signals that are transmitted electrically and imitate the original signal. They are older, less expensive.


Digital signals are discreet binary signals that are transmitted quicker and produce clearer pictures and sounds but with decreased nuances of color and tone.


electronic output

The output transforms signals into a useful form.

Signals are often visual or audio.


Other Actvities

The old televsion sets provided a very easy explanation of input and output signals. The antenna captured the signal and the television screen displayed it. Ask the students to give examples of other types of electronics and what their input and output signals would be.

Input Output Scramble

Use the italicized examples of inputs and outputs provided in the information pieces. You can rewrite them on larger cards if you desire. The student(s) sort them into two piles: input and output.


Have students draw simple diagrams of different types of electronics. They should identify the input, output, and SPU. As an alternative to drawing diagrams you can also use:

Circuit Boards

Ready to learn more? The next MatchCard on Circuit Boards will teach you how incoming signals are changed to outgoing signals. Don't miss any of the MatchCard Science Technology activities.

MatchCard Science

How To Use MatchCards

MatchCard Science Instructor's Guide

MatchCards are like flashcards - but fun. Students learn and review all the major science concepts with one MatchCard for each objective. Learn how to set up a MatchCard Notebook with the free download of the MatchCard Science Instructor's Guide.

Review 5 objectives a day, three days a week and watch how their knowledge of science expands.

Technology Unit Study

Technology Unit Study Cover

The technology unit study provides middle school studies with six different lessons to introduce them to beginning engineering and technology. Even the non-techies can have fun with these non-intimidating and practical lessons.

Download the complete Technology Unit Study for a four to six week course.

12 Complete MatchCard Science Unit Studies

MatchCard Science Cover

There's even more! MatchCard Science has a total of 12 unit studies comprising all major areas of science. Comprehensive objectives, reusable MatchCards, hands-on demonstrations, and suggested projects make MatchCard Science Unit Studies a rewarding science curriculum for students who like to get their hands into science.

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