Waves and Information Technologies Topic 6

In a busy airport, with the large number of devices communicating wirelessly, how are the signals kept from going to the wrong place?

• Each device has an internal code that has to match the code of an incoming transmission.

• Different devices operate on different wavelengths of the electromagnetic spectrum

• The signals are routed through the wireless network like a post office sorts mail by zip code.

• Devices with larger antennae use higher frequencies and devices with smaller antennae use lower frequencies to communicate.

Tags

NGSS.HS-PS4-5

Chloe is trying to filter out noise from both an analog and a digital signal. Which type of signal is generally more challenging to clean up?

• analog, because it is a continuous signal with infinite values, making noise removal difficult

• analog, because it is a discrete signal made up of ones and zeroes, making noise removal difficult

• digital, because it is a continuous signal with infinite values, making noise removal difficult

• digital, because it is a discrete signal made up of ones and zeroes, making noise removal difficult

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NGSS.MS-PS4-3

Nora and Daniel are working on a project to improve communications for various devices. Which of the following are ways that software can be used in communication technologies?

• better antennae for better range

• ability for encryption for security

• thicker wires for durability

• increasing bandwidth for speed of transmissions

Tags

NGSS.MS-PS4-3

The two waves in the image are traveling at the same speed. Which statement best describes the difference between the waves?

• wave A has a higher frequency than wave B

• wave A has a lower frequency than wave B

• wave A has a higher amplitude than wave B

• wave A has a lower amplitude than wave B

Tags

NGSS.MS-PS4-1

When a wave travels through a medium, what is primarily being transferred?

• A. energy

• B. particles

• C. both particles and energy

• D. neither particles nor energy

Tags

NGSS.MS-PS4-1

In the figure shown below, point B is called a ______.

• amplitude

• crest

• wavelength

• trough

Tags

NGSS.MS-PS4-1

In the figure shown below, what is the distance of the wavelength?

• Point 4

• Point 2

• Point 6

• Point 5

Tags

NGSS.MS-PS4-1

While observing the ocean from the pier, Sarah noticed that she could count the same number of waves passing by every 15 seconds. What was Sarah measuring?

• wavelength

• frequency

• speed

• amplitude

The amplitude of the wave in the diagram below is given by letter

• A

• B

• C

• D

Tags

NGSS.MS-PS4-1

The wavelength of the wave in the diagram below is given by letter

• A

• B

• C

• D

• E