Waves Science- Codes, Signals, and Pixels Lesson

Introduction to Signals & Codes- Waves & Interactions

For: Science 8 Honors Students

Standards & Objectives

8-PS4-3. Communicate information to support the claim that digital devices are used to improve our understanding of how waves transmit information.

Objectives:
-Identify the concepts of wave codes, signals, and pixels.

-Observe the differences between morse code and binary code and analog signals and digital signals.

-Analyze and review pixels in codes and signals.

-Review the history of digital devices.

Morse code is a communication system that takes dots and dashes and uses them to represent letters, numbers, and punctuation. It was developed by Samuel Morse and Alfred Vail in the 1930s.

What is Morse Code?

Binary code is a digital tech language that uses 1's and 0's to represent letters, numbers, and punctuation. It is the language computers use to store and send info.

What is Binary Code?

An analog signal is a continuous signal that varies in frequency and strength over time.
A digital signal is a data representation that uses binary code to convey info.

What are Analog & Digital Signals?

Pixels are a small unit in digital technology display. They make up the images and videos on a device's screen.

What are Pixels?

Multiple Select

Who created Morse Code? (2 Answers)

• Issac Newton

• Alfred Vail

• Samuel Morse

• Galileo Galilei

Draw

Draw what both an analog signal wave and a digital signal wave looks like. (REMEMBER TO DRAW THE LINE IN THE MIDDLE!)

Open Ended

What are Pixels?

Open Ended

1. What's the difference between analog signals and digital signals?

2. What's the difference between Morse code and binary code?

   (When answering, number your answers as you go along)

Poll

Will you be prepared for the last lesson of this unit?

• Yes!!!

• Very Likely

• Maybe

• Not Likely

• No