What is Sound?

Sound waves are created by vibrations transferring energy to surrounding particles, forming mechanical waves that travel through matter but not a vacuum. Sound is a longitudinal wave, with pitch determined by frequency and loudness by amplitude. Vibrations reach our ears, causing bones to vibrate and convert movement into electrical signals for the brain.

What is necessary for sound waves to travel?

• Matter

• A vacuum

• Electricity

• Light

How do particles move in a longitudinal wave?

• Perpendicular to the wave direction

• In a circular motion

• Along the direction of the wave

• In a zigzag pattern

What determines the pitch of a sound?

• Speed

• Wavelength

• Frequency

• Amplitude

What happens to the pitch when the frequency of a sound wave increases?

• The pitch becomes inaudible

• The pitch decreases

• The pitch increases

• The pitch remains the same

What aspect of a sound wave affects its loudness?

• Frequency

• Wavelength

• Amplitude

• Speed