What statement explains the changes from wave A to wave B?

The energy and amplitude increase.

The energy decreases as the amplitude increases.

The energy and amplitude decrease.

The energy increases as the amplitude decreases.

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

Analog signals take up less bandwidth or storage space than digital

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

Sound can be recorded either digitally or using analog techniques

Which of these would be the most reliable method for transmitting waves for communication?

The use of fiber optics to transmit a digital signal

The use of the postal service to mail a letter

The use of knocking on all the doors in the neighborhood

The use of printed newspapers and magazines

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

Digital recordings do not get corrupted by noise. You are sending a series of numbers that represent the signal

Digital recordings can be stored on a computer

Digital components are small and inexpensive

Digital components require a power source

Old cassette tape sound recordings often would have extra noise on the tape. A new digital computer file only contains the recorded sound. Which statement is the best conclusion that can be drawn from this information?

Digital sound recording is more reliable than the older method

Digital sound recording is cheaper to produce than the older method

Digital sound recording can be copied much easier than the older method

Digital sound recording takes up less space than the older method

When communicating with Apollo astronauts, there is approximately a 1.3 second delay in one-way communication. This is because

radio waves travel at a speed of 186,000 miles/s

of the scattering of electromagnetic waves in space

the moon has virtually no atmosphere

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 imperfection 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 not likely to be replace other methods

Digital transmission of information can easily be converted to analog

Digital transmission of information is the least expensive method

Which of these statements would support the claim that digitized signals are a more reliable way to transmit information?

Digitized signals do not lose information even as they get weaker

Digitized signals can be stored on small computerize devices

Analog signals often pick up extraneous information

Analog signals can be recorded using magnetic devices

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

Digital recordings do not get corrupted by noise

Digital components require a power source

Digital components are small and inexpensive

Digital recordings can be stored on a computer

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 better technology for encoding and transmitting data.

Digital devices are often smaller than analog devices.

Digital transmission is a newer technology.

Analog devices are often used in wifi devices.

Which of the following statements accurately describes the relationship between the amplitude and energy of a wave?

The amplitude and energy of a wave are directly proportional.

The amplitude and energy of a wave are unrelated.

The amplitude determines the wavelength, not the energy of a wave.

The amplitude and energy of a wave are inversely proportional.

Which of these waves would have the greatest amount of energy?

There is not enough information

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

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

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

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

Waves Unit Review

Authored by Chelsea Durbin

Science

8th Grade

NGSS covered

Used 82+ times

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30 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Comparing Wave A (black) to Wave B (green), Wave A has a

higher frequency

greater amplitude

longer wavelength

higher crest

Tags

NGSS.MS-PS4-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Box 1 on the diagram indicates which energy level of the wave

Greatest energy

2nd greatest energy

3rd greatest energy

least energy

Tags

NGSS.MS-PS4-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Box 2 on the diagram indicates which energy level of the wave

Greatest energy

2nd greatest energy

3rd greatest energy

least energy

Tags

NGSS.MS-PS4-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Box 3 on the diagram indicates which energy level of the wave

Greatest energy

2nd greatest energy

3rd greatest energy

least energy

Tags

NGSS.MS-PS4-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Box 4 on the diagram indicates which energy level of the wave

Greatest energy

2nd greatest energy

3rd greatest energy

least energy

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Cassette tape record often include extra pops and noise. Digital recordings only include the actual recorded sound. Which statement is the best conclusion based on these facts?

Digital recordings are require less space than the older method

Digital recordings are less expensive to produce than the older method

Digital recordings are more reliable than the older method

Digital recordings are can be transmitted faster than the older method

Tags

NGSS.MS-PS4-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The graph indicates what about the relationship between wavelength and frequency?

as wavelength decreases, frequency increases

as wavelength decreases, frequency decreases

as wavelength increases, frequency increases

there is no relationship between wavelength and frequency

Tags

NGSS.HS-PS4-1

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Waves Unit Review

Comparing Wave A (black) to Wave B (green), Wave A has a

Box 1 on the diagram indicates which energy level of the wave

Box 2 on the diagram indicates which energy level of the wave

Box 3 on the diagram indicates which energy level of the wave

Box 4 on the diagram indicates which energy level of the wave

Cassette tape record often include extra pops and noise. Digital recordings only include the actual recorded sound. Which statement is the best conclusion based on these facts?

The graph indicates what about the relationship between wavelength and frequency?

What statement explains the changes from wave A to wave B?

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

From the list of communication devices, which would be considered analog: VCR, DVD player, Record player, Computer & CD player

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