Mysteries and Investigations, Flashcard 4

Front

What is a loudspeaker?

Back

A device that changes electrical signals into sound.

Front

What is a decade?

Back

A period of 10 years.

Front

What does it mean to circle?

Back

To move through.

Front

What are coolers?

Back

Insulated containers.

Front

What does it mean to be busy?

Back

To be in a very active way.

Front

What is the function of a loudspeaker in audio systems?

Back

To convert electrical audio signals into audible sound.

Front

How many years are in two decades?

Back

20 years.

Front

What is the significance of circling in navigation?

Back

It often refers to moving around a point or area, which can be crucial for finding locations.

Front

What materials are commonly used for making coolers?

Back

Insulating materials like foam or plastic.

Front

In what contexts might someone be described as busy?

Back

In work, school, or during activities that require active engagement.