Lesson 7.3

Which type of signal is typically shown using square waves?

• Digital Signals

• Analog Signals

• Magnetic Signals

• Electric Signals

Answer explanation

This question links to success criteria: I can explain the difference between analog and digital signals and common applications of each.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Which type of signal is typically shown using smooth waves?

• Digital Signals

• Analog Signals

• Magnetic Signals

• Electric Signals

Answer explanation

This question links to success criteria: I can explain the difference between analog and digital signals and common applications of each.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Match each device with its correct description

• Storage for Analog Audio

• 
• Device for sending and receiving analog audio

• 
• Device for sending and receiving digital signals

• 
• Device for storing digital information

• 
• Device for receiving analog video

• 

Answer explanation

This question links to success criteria: I can explain the difference between analog and digital signals and common applications of each.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

The picture shows both Frequency modulation and Amplitude modulation of the same digital signal. Which of the following 5 digit number is being transmitted?

• 01010

• 11001

• 00111

• 10001

Answer explanation

This question links to success criteria: I can use modulation to explain how information is carried by waves.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Match the following pictures to the correct descriptions

• Digital Frequency Modulation

• 
• Analog Amplitude Modulation

• 
• Analog Frequency Modulation

• 
• Digital Amplitude Modulation

• 

Answer explanation

This question links to success criteria: I can use modulation to explain how information is carried by waves.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

What method of sending signals creates changing patterns in the height of each wave pulse?

• Amplitude Modulation

• Frequency Modulation

• Transverse Modulation

• Longitudinal Modulation

Answer explanation

This question links to success criteria: I can use modulation to explain how information is carried by waves.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

What method of sending signals creates changing patterns in the number of wave pulses sent each second?

• Amplitude Modulation

• Frequency Modulation

• Transverse Modulation

• Longitudinal Modulation

Answer explanation

This question links to success criteria: I can use modulation to explain how information is carried by waves.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Which of the following supports the argument that analog storage is better for recording audio files?

• Analog signals are continuous and extremely detailed. This allows the signal to capture more detail.

• Analog signals are hard to copy and as such are more expensive to own.

• Analog signals are cheaper to make so it is easier to buy them at the store.

• Analog signals are easier to change than digital signals, allowing anyone to change the audio to make it sound better.

Answer explanation

This question links to success criteria: I can identify pros and cons of both analog and digital signal transmission and storage. 

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Which of the following supports the argument that digital storage is better for recording audio files?

• Digital information is easier to repair if damaged since it is stored in 8 byte parts.

• Digital signals are easy to read even when transmitted over extreme distances

• Digital information contains higher levels of detail.

• Digital information is easier to steal.

Answer explanation

This question links to success criteria: I can identify pros and cons of both analog and digital signal transmission and storage. 

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Match the pros and cons of analog and digital technologies.

• Analog storage (Pro)

• Theft of information is much more difficult

• Digital Storage (Pro)

• Thieves can easily copy information remotely

• Analog Storage (Con)

• Making a copy requires reproducing the original signal in its entirety.

• Digital Storage (con)

• Damaged signals can be more easily repaired.

Answer explanation

This question links to success criteria: I can identify pros and cons of both analog and digital signal transmission and storage. 

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.