Assessment PS4-3

1. Which type of signal is most reliable?

• Analog signals
• Digital signals
• Wave signals
• Flash signals

2. What does it mean to encode information?

• To convert into a form and give it meaning
• To decipher and figure out what it means
• To change the frequency of the wave
• To explain something

3. Which type of signal can be transmitted over long distances and easily stored?

• Analog signals
• Digital signals
• Wave signals
• Flash signals

4. Which of these are are advantages of digital signals?

• Digital signals do not break down over time
• Digital signals are inexpensive
• Digital signals are not stable
• Digital signals are lighter than analog signals

5. Why are analog waves more influenced by noise than digital waves?

• Analog waves have a higher amplitude than digital waves
• Analog waves have a greater frequency than digital waves
• Analog waves are one continuous stream
• Analog waves have an on and off feature

6. Why are waves perfect for sending information?

• Waves can transport matter over long distances
• Waves move up and down
• You can always see waves
• Waves transport energy but not matter

7. If a message is disrupted, which type of signal has to start over from the beginning?

• Analog signals
• Digital signals
• Wave signals
• Flash signals

Digitized signals are a more reliable way to encode and transmit information than analog signals.

Almost all forms of communication rely on waves.

We see encoded symbols all the time in our everyday life.