Sound

Unit Review Sheet

Facts and Definitions

Lesson 1: Listening for Sounds

• People who do not hear are deaf.
• Vibrations occur when an object moves or shakes back and forth.
• Vibrations make sound.

Lesson 2: The Ear

• The ear is made up of many parts.
• Sound waves travel through the ear and cause vibrations within the ear.
• Nerves send messages from the ear to the brain.

Lesson 3: Sound Travels

• Sound travels more quickly through solids and liquids than through gases.

Lesson 4: Sound Waves

• Sound travels through sound waves.
• Frequency is how fast or slow sound vibrates.
• Frequency is also called pitch or note.
• High-pitched sound waves move quickly, and low-pitched sound waves move slowly.

Lesson 5: Pitch or Frequency

• Sound waves with a faster vibration have a high pitch, and sound waves with a slower vibration have a low pitch.

Lesson 6: Music, Voice, and Instruments

• Wind instruments are those that you blow into to create a sound.
• Percussion instruments are instruments that you rub together, shake, or strike with your hand.
• Stringed instruments are those that have strings that you strum with fingers or a bow.
• Vocal cords are flaps of tissue in the throat that vibrate and make sound.

Final Project: Design an Instrument

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