1. Investigating sound

2. Sound Form of energy that travels through matter as waves Wave Disturbance that transfers energy from point to point

3. Frequency The number of waves produced in a unit of time Pitch The highness or lowness of a sound Amplitude Measure of the amount of energy in a sound wave

4. Vibration The back & forth movement of matter where energy is transferred

5. VACUUM (SPACE) NO MATTER SOUND CANNOT TRAVEL

6. Transmit Sound Fastest MOLECULES OF MATTER CLOSER TOGETHER SOLID Transmit Sound Slowest MOLECULES OF MATTER FARTHER APART GASES

7. MOST OF SOUND ABSORBED SOFT OBJECT SOUND WAVES

8. FREQUENCY PITCH FREQUENCY PITCH

9. LOUDER SOUND AMPLITUDE SOFTER SOUND AMPLITUDE

11. Blow air through straw

12. Trim straw to make it shorter

14. How do we hear sound?

16. Some species do not have vocal cords.

20. MUSICAL INSTRUMENTS Vibrating air makes the sound Brass Instruments Produce sound by being hit or shaken Percussion Instruments

21. MUSICAL INSTRUMENTS Strings of different lengths hit by small hammers to produce sound Piano and Other Instruments Vibration of vocal chords makes sound Voice

22. MAKE YOUR OWN MUSICAL INSTRUMENT