Grade 9 Sound

What are the properties of sound waves?

• Properties of sound waves include weight, density, and volume.

• Properties of sound waves include color, texture, and shape.

• Properties of sound waves include frequency, amplitude, wavelength, and speed.

• Properties of sound waves include taste, smell, and temperature.

How do sound waves travel through different mediums?

• By creating a vacuum in the medium

• By causing the particles in the medium to vibrate and transfer the sound energy

• By causing the medium to change color

• By generating electricity in the medium

What are the characteristics of sound?

• Speed, weight, height, and distance

• Taste, smell, touch, and sight

• Pitch, loudness, quality, and duration

• Color, texture, temperature, and shape

Explain the difference between pitch and frequency.

• Pitch refers to how high or low a sound is perceived, while frequency is the number of vibrations per second that produce a sound.

• Pitch is the number of vibrations per second that produce a sound, while frequency refers to how high or low a sound is perceived.

• Pitch and frequency are the same thing and can be used interchangeably.

• Pitch is only relevant for musical sounds, while frequency is only relevant for non-musical sounds.

How does amplitude affect the loudness of sound?

• Amplitude causes the sound to become softer.

• Amplitude increases the pitch of sound.

• Amplitude has no effect on the loudness of sound.

• Amplitude determines the loudness of sound.

What is the relationship between frequency and pitch?

• Frequency and pitch are completely unrelated

• Frequency and pitch have an inverse relationship

• Frequency and pitch only have a slight connection

• Frequency and pitch are directly related

What factors affect the propagation of sound?

• Type of music, volume of the sound, and direction of the wind

• Temperature, humidity, and the medium through which the sound travels

• Time of day, distance from the equator, and altitude

• Color, weight, and shape of the object

Explain how sound travels through solids, liquids, and gases.

• Sound travels through solids, liquids, and gases by the force of gravity

• Sound travels through solids, liquids, and gases by the movement of light particles

• The vibration of particles in the medium allows sound to travel through solids, liquids, and gases.

• Sound travels through solids, liquids, and gases by the reflection of sound waves

How does the temperature of a medium affect the speed of sound?

• Sound travels faster in colder temperatures and slower in warmer temperatures.

• Sound travels at the same speed in all temperatures.

• Sound travels faster in high altitudes and slower in low altitudes.

• Sound travels faster in warmer temperatures and slower in colder temperatures.

What is the Doppler effect and how does it relate to sound propagation?

• The Doppler effect causes a decrease in the volume of sound as the source moves closer to the observer.

• The Doppler effect causes a delay in the propagation of sound waves.

• The Doppler effect causes a change in the color of sound as the source moves.

• The Doppler effect causes a shift in the perceived pitch of sound as the source or the observer moves.