Waves - Lesson 11 Flashcard

Front

What are gestures used for in communication?

Back

To communicate feelings or messages without speaking.

Front

Who developed Morse code?

Back

Samuel Morse.

Front

Which of the following is NOT a way mentioned in the text that people communicate?

Back

Telepathy.

Front

What does NASA's Deep Space Network use to communicate with spacecraft?

Back

Radio waves.

Front

What does binary code use to represent information?

Back

Two different symbols.

Front

What is a wave?

Back

A disturbance that transfers energy from one place to another.

Front

What are the two main types of waves?

Back

Mechanical waves and electromagnetic waves.

Front

What is a mechanical wave?

Back

A wave that requires a medium (solid, liquid, or gas) to travel through.

Front

What is an electromagnetic wave?

Back

A wave that can travel through a vacuum and does not require a medium.

Front

What is amplitude in a wave?

Back

The maximum distance the wave moves from its rest position.