Analog vs Digital

Multiple Choice

How do electromagnetic waves facilitate communication?

• They travel slowly

• They can be modulated

• They do not carry information

• They are only used in telephones

Multiple Choice

What is one advantage of transmitting information with waves?

• They are slower than sound waves

• They can permanently move matter

• They hold energy as they travel

• They are less efficient

Multiple Choice

What are some examples of encoding signals?

• Verbal speech

• Braille

• Morse code

• All of the above

Multiple Choice

What is a signal and how does it communicate?

• A type of sound only

• A piece of information

• A method of encoding

• A form of electromagnetic wave

Multiple Choice

What happens to an analog signal over time?

• It becomes digital

• It remains unchanged

• It can be modified by noise

• It is always clear

Multiple Choice

What is an analog signal?

• A digital representation of data

• A continuous signal that changes over time

• A signal that is only used in computers

• A type of noise in communication

Multiple Choice

What affects how well a signal is transmitted?

• The distance from the source

• The type of signal

• The medium through which it travels

• The time of day

Open Ended

Explain how digital signals are used in technology today.

Multiple Choice

What happens to a digital signal over time?

• It remains unchanged

• It deteriorates like an analog signal

• It improves in quality

• It becomes continuous

Multiple Choice

How does a digital signal encode information?

• By using continuous values

• By using binary numbers

• By using analog signals

• By using only one value

Multiple Choice

What is a digital signal?

• A continuous signal that varies over time

• An electric signal that changes between two values

• A type of analog signal

• A signal that cannot be transmitted electronically

Multiple Choice

How does digital technology advance science and scientific investigations?

• By reducing noise in data transmission

• By increasing the size of data storage

• By providing analog signals for better clarity

• By limiting the amount of information processed

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident