Light and Sound

How does the length of a guitar string affect the sound it makes?

• Longer strings produce higher pitches.

• Shorter strings produce lower pitches.

• Longer strings produce lower pitches, while shorter strings produce higher pitches.

• The length of the string has no effect on the sound.

What is the role of the medium in sound travel?

• Sound travels through a medium by vibrating the particles in that medium.

• Sound can travel without a medium.

• The medium absorbs sound and prevents it from traveling.

• Sound travels faster in a vacuum than in any medium.

What is refraction?

• The reflection of light off a surface.

• The bending of light as it passes from one medium to another, such as from air into water.

• The scattering of light in different directions.

• The absorption of light by a material.

What happens to light when it hits a reflective surface?

• It passes through the surface without any change.

• It is absorbed by the surface.

• It bounces back. This is called reflection.

• It changes color upon hitting the surface.

What is volume?

• The amount of space an object occupies.

• The loudness or softness of a sound.

• The speed at which sound travels.

• The frequency of sound waves.

What is an example of a transparent material?

• Clear glass

• Wood

• Brick

• Metal

What causes sound?

• Sound is caused by vibrations.

• Sound is caused by light.

• Sound is caused by heat.

• Sound is caused by pressure changes.

What is an example of a sound being produced by vibration?

• A guitar makes sound when its strings vibrate.

• A light bulb glows when electricity flows through it.

• A car moves when the engine is started.

• A tree grows when it receives sunlight.

What is the speed of light compared to the speed of sound?

• The speed of light is slower than the speed of sound.

• The speed of light is equal to the speed of sound.

• The speed of light is much faster than the speed of sound.

• The speed of light is slightly faster than the speed of sound.

What is an echo?

• A type of sound wave that travels in a straight line.

• A reflection of sound that arrives at the listener after a delay.

• A sound that is produced by a musical instrument.

• A phenomenon where sound is absorbed by materials.