Changing pitch – Did you know?

The video explains how vibrations have different frequencies and how a person singing at the right frequency and volume can cause glass molecules to vibrate intensely, leading to the glass shattering.

What is a characteristic of vibrations?

• They do not have any frequency.

• They have the same frequency.

• They have different frequencies.

• They are always inaudible.

What can a person achieve by singing at the right frequency?

• Turn glass into a liquid.

• Melt the glass.

• Make glass molecules vibrate.

• Change the color of glass.

What is necessary for a person to cause glass molecules to vibrate?

• Singing with a soft voice.

• Singing with a deep voice.

• Singing at a high enough volume.

• Singing at a low volume.

What happens to glass when its molecules vibrate excessively?

• It melts.

• It shatters.

• It becomes stronger.

• It changes color.

Which of the following is NOT a factor in causing glass to shatter?

• The right frequency.

• High volume.

• The color of the glass.

• Vibration of molecules.