I WONDER - How Are Echoes Caused?

The video explains how sound waves interact with different surfaces. Sound waves can reflect off flat surfaces, creating echoes, or be absorbed by soft materials, making environments quieter. It highlights unique echo phenomena worldwide, including the Cookham Pyramid in Mexico, where a clap echoes back as a bird chirp.

What happens to sound waves when they hit flat surfaces?

• They are absorbed completely.

• They bounce back to the source.

• They disappear.

• They change color.

Why are rooms with carpets and curtains quieter?

• Because they reflect sound waves.

• Because they absorb sound waves.

• Because they amplify sound waves.

• Because they block sound waves.

Where can you experience a unique echo that sounds like a bird chirping?

• The Eiffel Tower in France

• The Great Wall of China

• The Cookham Pyramid in Mexico

• The Statue of Liberty in the USA

What is the effect of clapping at the bottom of the Cookham Pyramid?

• It echoes back as a bird chirping.

• It creates no echo.

• It echoes back as a clap.

• It creates a loud explosion sound.

What is the primary reason some places have interesting echoes?

• The presence of loud noises.

• The absence of any surfaces.

• The unique shape and materials of the environment.

• The presence of soft surfaces.