Waves of Sound

What is sound?

• speakers

• a vibration

• volume

• pitch

What causes sound energy when a person speaks?

• Moving the lips

• Breathing in air

• Moving the tongue

• Vibrating vocal cords

Which of the following statements are TRUE about sound.

• Sound is a form of energy

• Sound can be seen

• Sound is heard only by people

• Sound can only travel through air

What is volume?

• How high or low a sound is

• What your teacher needs to add to their hair

• How loud or soft a sound is

• How much sound a container can hold

Sarah is playing the guitar. How can she increase the volume of her playing?

• Play the guitar quickly to create faster vibrations

• Pluck the thinner stings to make smaller vibrations

• Pluck the strings with more force to make larger vibrations

• Play the guitar slowly so the strings can finish their vibrations

Look at the musical instruments.

The flute plays the highest notes, while the sousaphone can play the lowest. Which instrument makes sounds with the faster vibrations?

• Saxophone

• Flute

• Sousaphone

What is pitch?

• How loud or soft a sound is

• How thick or thin a sound is

• How high or low a sound is

• A Pretty Iguana That Chachas Happily

How does the speed of the vibration affect the pitch?

• The slower the vibrations the higher the pitch; the faster the vibration the lower the pitch

• The faster the vibration the louder the pitch; the slower the vibration the softer the pitch

• The faster the vibration the higher the pitch; the slower the vibration the lower the pitch

• The slower the vibration the louder the pitch; the faster the vibration the softer the pitch

What pitch would this instrument make?

• High pitch

• Low pitch

What pitch would this instrument make?

• High Pitch

• Low Pitch