/ I / the Phenomenon |
|
why has THe world has gone digital?
|
|
[CER] DISCUSSION QUESTION:
What is better for encoding and transmitting information - digital or analog signals? Make a claim then gather evidence to support and justify your claim throughout this lesson. |
/ Ii / Investigate
1. KTLA Turns Off Analog - learn why a television station in Los Angeles turned off on June 12, 2009.
2. Digital vs. Analog - imagine you are a music producer - use a variety of sources (text, graphics, video) to gather evidence to support a claim to your producer about using digital or analog signals to create your music. 3. Over and Out - build model systems that encode information into digital and analog signals, transmit signals, and decode signals. |
/ iII / Level Up!
During this lesson you will learn more about how instruments transmit and detect waves to extend human senses including:
- Appropriately designed technologies (e.g., radio, television, cell phones, wired and wireless computer networks) make it possible to detect and interpret many types of signals that cannot be sensed directly.
- Designers of such devices must understand both the signal and its interactions with matter.
- Many modern communication devices use digitized signals (sent as wave pulses) as a more reliable way to encode and transmit information.
Learn More about the Advantages and Disadvantages of Digital and Analog Signals! | |
File Size: | 49 kb |
File Type: |
/ IV / choose your path
ADVANCED [+4 points]
Analyze the advantages and disadvantages of digital and analog clocks and support a claim that digital clocks are better.
|
/ V / Knowledge Check
The earliest timekeeping devices date back to ancient civilizations, where sundials were used to measure time based on the position of the sun's shadow. These early sundials were the predecessors of analog clocks, using a fixed dial and a moving shadow to indicate the time of day. In analog systems, information is represented by continuously varying physical quantities such as voltage, current, or sound pressure. Analog clocks for example, display the passage of time through continuous motion of the hands, providing a visual representation of time's flow.
The development of electronics in the 20th century paved the way for digital timekeeping devices. With the development of light-emitting diodes (LEDs) and liquid crystal displays (LCDs) in the 1970s and 1980s, digital clock displays became more compact, energy-efficient, and versatile and more integrated into a wide range of consumer electronics, including alarm clocks, calculators, and digital watches.
Analog and digital are essentially two different ways of representing and processing information. Today, both analog and digital clocks continue to coexist, each offering unique advantages and serving different purposes in our daily lives. Overall, while both analog and digital systems have their advantages and disadvantages, digital technology has become increasingly prevalent due to its versatility, reliability, and efficiency in representing, processing, storing, and transmitting information over long distances without significant degradation.
Analog and digital are essentially two different ways of representing and processing information. Today, both analog and digital clocks continue to coexist, each offering unique advantages and serving different purposes in our daily lives. Overall, while both analog and digital systems have their advantages and disadvantages, digital technology has become increasingly prevalent due to its versatility, reliability, and efficiency in representing, processing, storing, and transmitting information over long distances without significant degradation.
|
|
✓ MASTERY CHECK
National Research Council 2012. A Framework for K-12 Science Education: Practices, Crosscutting Concepts, and Core Ideas. Washington, DC: The National Academies Press. https://doi.org/10.17226/13165
This site contains original content that may not be authorized for use by the creator and is legally used under the fair use principles section 107 of the Copyright Act of 1986 (17 U.S. Code § 107)
The official NGSS website. https://www.nextgenscience.org
PS4.C, MS-PS4-3
Integrate qualitative scientific and technical information to support the claim that digitized signals are a more reliable way to encode and transmit information than analog signals. (Structure and Function) [MS-PS4-3]
This site contains original content that may not be authorized for use by the creator and is legally used under the fair use principles section 107 of the Copyright Act of 1986 (17 U.S. Code § 107)
The official NGSS website. https://www.nextgenscience.org
PS4.C, MS-PS4-3
Integrate qualitative scientific and technical information to support the claim that digitized signals are a more reliable way to encode and transmit information than analog signals. (Structure and Function) [MS-PS4-3]