CSA 8.PS4.3 ESSENTIAL STANDARD

Which statement accurately describes the difference between digital and analog information?

• Digital information is continuous and smooth, while analog is discrete.

• Digital information is represented by waves, while analog data is represented by light. 

• Digital information is represented by numerical values, while analog is represented by continuous waves. 

• Digital information is more at risk of being interrupted by interference than analog information.

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DOK2

Which statement explains why a television signal might be weak and hard to see when weather is bad during a thunderstorm?

• Analog and digital signals are both sent as continuous data, which can be disrupted by lightning and thunder.

• Digital signals are less reliable than analog signals. Digital signals are interrupted by the rain since digital signals cannot pass through water. 

• Analog signals are less reliable than digital signals, so analog television signals can be interrupted by bad weather.

• Analog and digital signals are both sent as discrete data, which can be interrupted by rain and lightning.

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DOK2

Which statement best describes the difference between digital and analog information?

• Digital information is continuous, while analog information is discrete.

• Digital information is represented by a series of 0's and 1's, while analog information is represented by a continuous signal.

• Digital information is only used for audio, while analog information is used for video.

• Analog information is more accurate than digital information.

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DOK2

QR (Quick Response) codes, like the one in this image, are images that can be scanned like bar codes. Which statement BEST describes how they are used?

• QR codes can can help people who are in trouble and have no way to contact anyone through voice or text.

• QR codes are used to identify objects, and are found on almost all items in supermarkets and department stores.

• QR codes are used to transmit coded sound using a series of dashes and dots to represent letters of the alphabet.

• QR codes are scanned with cell phones or tablets, allowing people to view advertisements, movie trailers, and other information.

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DOK2

Digital signals are processed by digital circuit components or electronic components.. Analog signals are processed with mechanical components. Which statement would bolster the argument that digital transmission of data is a better choice for data transmission.

• Mechanical components often include magnets.

• Electronic components require a power source.

• Electronic components are small and inexpensive.

• Mechanical and electronic component both can break.

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DOK2

Digital signals can easily be encoded so that transmissions such as wifi can be secure. Analog signals are more difficult encode and decode. What conclusion would this best support?

• Digital transmission is a newer technology.

• Analog devices are often used in wifi devices.

• Digital devices are often smaller than analog devices.

• Digital transmission is a better technology for encoding and transmitting data.

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DOK3

Which of these is an advantage of digital storage of information over analog?

• A copy of an analog file is never as good as its original.

• Sound can be recorded either digitally or using analog techniques.

• Analog signals take up less bandwidth or storage space than digital.

• Analog storage of information is continuous and capture a more pure sound.

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DOK3

A digital signal transmits energy in the form of waves. These waves can travel at the speed of light. Only digital information can be read and scratches or other imperfections are not read. Which conclusion would be best based on this information?

• Digital transmission of information is a fast and reliable method.

• Digital transmission of information is the least expensive method.

• Digital transmission of information can easily be converted to analog.

• Digital transmission of information is not likely to be replace other methods.

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DOK3

Which of these does not strengthen the argument that digital recording and transmission is better than analog?

• Digital recordings are not affected by noise.

• Digital recordings are only a close approximation to the true analog sound.

• Digital recordings can be encrypted so that only the intended receiver can decode it

• Digital recordings can be processed by circuit components, which are cheap and easily produced.

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DOK3

Which of these statements supports the idea that digital recording of audio is more reliable than analog recording?

• Digital components require a power source.

• Digital components are small and inexpensive.

• Digital recordings can be stored on a computer.

• Digital recordings do not get corrupted by noise. 

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DOK3