Mod.L Unit2 Lesson1

Morse code represents letters as combinations of different lengths of waves. Which type of wave was used in telegraphs to communicate in Morse code?

• light

• radio

• sound

• electricity

Tags

NGSS.MS-PS4-2

Which is the most accurate definition of communication?

• a tool by which an individual can receive information

• a device by which messages are encoded and decoded

• a skill by which an individual can send out information

• a process by which information is exchanged between individuals

Throughout history, encoding has been used to convert information from one system of communication into another. What was the main purpose of early communication devices that used encoding?

• to communicate at a distance

• to communicate with enemies

• to communicate about a natural event

• to communicate in different languages

Different types of waves can be used to transmit information. Which type is the most common in modern communication devices?

• sound

• visible light

• alternating current

• electromagnetic waves

Tags

NGSS.MS-PS4-3

A communication device makes use of different frequencies of radio waves. Which one is considered as equivalent to each specific frequency at the receiving end?

• code

• signal

• information

• communication

Tags

NGSS.MS-PS4-3

In almost every modern means of communication, waves are used to transmit information. Which statement does not describe a characteristic of waves that makes them well-suited for this purpose?

• Waves can move very quickly.

• Waves only carry useful information.

• Waves can hold large amounts of information.

• Waves do not need to permanently move matter.

Tags

NGSS.MS-PS4-3

Throughout history, people manipulated fire and smoke to send out a specific message. What is the role of a smoke signal in physical terms?

• data

• signal

• wave

• transmitter

Tags

NGSS.MS-PS4-2