Review for Information Technology Test

Which of these is an example of transmitting information with digital code?

• Sending a text on a cell phone

• Using Morse Code

• Sending a letter through the mail

• Talking to someone in the same room

Tags

NGSS.MS-PS4-3

Which TWO devices use digital code to send information? (Choose 2)

• Telegraph

• Radio

• GPS Satellite

• Cell phone

Tags

NGSS.MS-PS4-3

You answer a cell phone and hear someone talking. What is your phone doing so that you can hear the caller?

• It is receiving digital information and converting it to the sound of the callers voice.

• It is digitizing your voice.

• It is sending radio signals to the caller.

• It is redirecting a digital signal from cell tower to cell tower.

Tags

NGSS.MS-PS4-2

Why are cell phone messages transmitted in digital code?

• Everyone understands digital code.

• A code cannot be broken.

• Digital code maintains the quality of sounds over long distances.

• It is less expensive to use digital code than ordinary radio signals.

Which of the following uses GPS? (Choose the BEST answer)

• Farmers to plant and manage crops

• Delivery drivers to locate addresses

• Runners or hikers to track their routes

• All of the above

Which of these would best transmit information over long distances, and why?

• Morse code, because it uses sound

• A cell phone, because it uses digitized data

• Hand signals, because they can be easily understood

• Facial expressions, because they show how a person is feeling

Tags

NGSS.MS-PS4-3

Melissa wants to send a message using Morse code. Which TWO devices can she use? (Choose 2)

• Telegraph

• Radio

• Flashlight

• Cell phone

GPS was invented by the US military as a navigation system. What does GPS use to provide you with an exact location?

• Radio waves

• Satellites

• Amplitude

• Light waves

Tags

NGSS.MS-PS4-3