Quiz on Communicating with Signals

What is a signal?

• A method of encoding

• A type of noise

• A piece of information communicated through senses

• A form of digital technology

What is required for a signal to be understood?

• A receiver to interpret the signal

• A written text

• A digital device

• A loud noise

Why are electromagnetic waves most effective in communication?

• Limited information transmission

• Permanent movement of matter

• Slow communication

• Fast communication over long distances

What is the main disadvantage of using waves to carry signals?

• They are too fast

• They are too complex

• They cannot carry information

• They lose energy as they travel

How does noise affect a signal over time?

• It improves the clarity

• It makes the signal stronger

• It has no effect

• It builds up and deteriorates the information

The unwanted modification of a signal is know as

• frequency

• wavelength

• noise

• encoding

Examples of ways to encode signals are:

• using binary code

• singing instead of talking

• body language and smiling

• using morse code

Moving signals over a distance is known as...

• encoding signals

• transmitting signals

• electromagnetic waves

• decoding signals

To be able to understand a signaled message from a friend across the room, you need: ...................

• headphones to drown out the noise

• the key to solve the encoded message

• Patience

• know your friend very well.

What are the three properties of signals.

• Signals can be colorful or loud

• Signals can be transmitted and lost

• Signals can be stored, encoded or transmitted

• Signals cannot be encoded