1. Investigating sound

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

3. Frequency Pitch Amplitude
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. The back & forth movement of matter where energy is transferred
Vibration
The back & forth movement of matter where energy is transferred

5. VACUUM (SPACE)
NO MATTER
SOUND CANNOT TRAVEL

6. SOLID GASES Transmit Sound Fastest Transmit Sound Slowest 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

10. STRAW ACTIVITY Place pointed end in mouth past cut portion
Blow air through straw
Trim straw to make it shorter
What happened to the pitch?

11. SOUND
STATIONS
ACTIVITY

12. How do we hear sound?

13. hear & make noise differently?
Why do humans & animals
hear & make noise differently?
Animal brains are not as complex as those of humans
Some species do not have vocal cords.
The vocal tracts of animals may differ in shape and size, so vocalizations sound different

14. SONAR ECHOLOCATION SOUND NAVIGATION
USES SOUND WAVES TO DETECT OBJECTS FAR AWAY
ECHOLOCATION
FORM OF SONAR
USED BY MARINE MAMMALS TO OBTAIN INFORMATION ABOUT SURROUNDINGS AND TO FIND FOOD

15. Produce sound by vibrating strings
MUSICAL INSTRUMENTS
Produce sound by vibrating strings
String
Instruments
A vibrating reed helps to make the sound
Woodwind
Instruments

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

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

18. MAKE YOUR OWN
MUSICAL INSTRUMENT