Our Senses – Investigation 5 CAP
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Explain to students that the communications industry employs many different types of people in a number of different professions. Electrical engineers and computer programmers and computer engineers are involved in many different areas of communications.
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We will use this CAP as a review of senses and communication. In this CAP, we will have fun with the students as they first try a couple of suggested ways of communicating over a distance using sight and sound and then coming up with their own approaches.
This slide can be used as a segue into the activities that will follow. Some of the methods of communication over a distance shown in this slide will likely be completely unfamiliar to students. This is particularly true for the flag signals, carrier pigeon and perhaps even the letter. Ask students to think of other ways people can communicate over a distance either in the present, in the past or in the future (newspapers, smoke signals, telegraph, particle transporters, etc.).
This slide gives directions for an activity to design a simple way of using sound to communicate over a distance. Students can work in pairs and determine how loud their voices are with and without their “megaphones”. They can also test the effect of pointing the megaphone at their partner or away from them when speaking into it. Allow students to modify this activity and be innovative as time permits.
This slide suggests a fun demonstration of a method of using light to communicate over a distance. If possible, it would be most instructive to place two students at opposite ends of a long hallway to do this activity. Using a combination of codes and strong, directional light sources, this approach of communication over a distance was used effectively by ships at sea for many years.
This final slide asks students to think of other ways to communicate over a distance. Allow students to express ideas that they have seen before (e.g. smoke signals in a movie) or to propose their own novel ideas about communication or even suggest new inventions for communication over a distance. They might even be encouraged to guess at ways people will communicate at great distances in the distant future.