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- 1. Multiple Choice
a pattern of dots and dashes, each one making up a letter or number
Morse code
binary code
pixels
bits
- 2. Multiple Choice
How does a cell phone send a picture to another cell phone?
It changes the picture into text.
It sends the picture through sound waves.
It downloads the picture into light waves.
It codes the picture into digital information.
- 3. Multiple Choice
Digital devices use _____ to send and transmit information.
binary code
Morse code
pixels
bits
- 4. Multiple Choice
A remote (also called a transmitter) uses light to carry signals from the remote to the device it controls. It emits pulses of invisible infrared light that correspond to specific binary codes. These codes represent commands, such as power on, volume up, or channel down.
A remote control sends signals to a television through:
sound waves
wires
light waves
binary code
- 5. Multiple Choice
A clear, bright image has:
lots of pixels
very few pixels
lots of data
binary code
- 6. Multiple Choice
What invention made it possible to communicate across long distances with electricity and Morse code?
telephone
telegraph
television
email
- 7. Multiple Choice
Images are made of millions of tiny dots called:
Morse code
binary
bits
pixels
- 8. Multiple Choice
Cell phones convert sound waves into ____, which are sent from tower to tower.
light waves
sound waves
radio waves
Morse code
- 9. Multiple Choice
Which of the following graphs represents a digital wave?
- 10. Multiple Choice
Which of the following is an analog technology?
- 11. Multiple Choice
Which type of wave is best described as smooth and continuous?
analog
digital
both analog and digital
neither
- 12. Multiple Choice
When you send a text message to the friend, what happens first after you have typed your message?
the phone encodes the letters of your message using ones and zeros
the phone sends an analog wave representing your message to another phone
the phone produces an electromagnetic wave with constant amplitude and frequency
the phone decodes the zeros and ones and converts them into letters
- 13. Multiple Choice
Which of the following graphs represents an analog wave?
- 14. Multiple ChoiceThe signal above is an example of a(n)Digital SignalAnalog Signal
- 15. Multiple ChoiceWhich is an example of an analog signal?Record PlayerCD Player
- 16. Multiple ChoiceWhich is an example of an analog signal?Blu-Ray DVDVHS Tape
- 17. Multiple Choice
The picture shows an example of what kind of signal?
Analog
Digital
- 18. Multiple ChoiceThe picture shows an example of what kind of signal?AnalogDigital
- 19. Multiple Choice
How do Fiber Optics work?
By connecting and transferring energy
By remitting and subtracting power from other fiber optics
By using light pulses to transfer data
By converting sound waves in to binary code
- 20. Multiple ChoiceWhat is the most prominent use of Fiber Optics today?PhonesTelevision ScreensThe InternetMRI imaging
- 21. Multiple ChoiceFor what are Fiber Optics mainly used?Long distance communicationImagingPhonesDownloading Apps
- 22. Multiple Choice
Which of these helps provide faster Internet connections?
mirrors
fiber optics
electricity
vision
- Answer choicesTagsAnswer choicesTags