(1) Sounds are made when objects or materials vibrate

(2) Sound vibration travels through different materials

(3) Some materials can prevent vibrations from sounds sources reaching your ear

(4) Some materials muffle sounds better than others

(5) "Pitch" describes how high or low a sound is

(6) Pitch and loudness are different. The pitch and loudness of drum sounds can be changed

(7) The are different ways to change the pitch and loudness of a stringed instrument

(8) Sounds can be made by vibrating air. Pitch and loudness in wind instruments can be changed. The length of the air column vibrating in a wind instrument changes the pitch

Learning Objectives (Skills): Sounds

(1) Make careful observations. Draw conclusions from observations

(2) Make a prediction. Plan a test. Decide how good the evidence is. Decide whether the results support the prediction

(3) Carry out tests of pitch and loudness