Physical Science information technology

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?

• 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 caller's 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.

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.

Tags

NGSS.MS-PS4-3

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 persons feeling

Tags

NGSS.MS-PS4-3

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

• 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-ETS1-1

Draw your first name in Morse code. (use - and .)