1. Sound Vocabulary Terms Objective (2.1):Describe the factors that affect the pitch and loudness of sound produced by vibrating objects.(2.3) Describe how sound is transmitted, reflected, and/or absorbed by different materials!!!

2. Vibrations Definition: The rapid back and forth movement of an object that causes sound. Example: Plucking a ruler on the side of a desk. (model) Example: Strumming the string on a guitar. Example: Beating a hand on a desk.

3. 2)Energy Definition: The ability to cause change. Example: Sound waves lose energy as they travel. Therefore, sounds that travel over longer distances are more difficult to hear.

4. Definition: Something that can be heard-a form of energy that is transmitted by an object vibrating. Sound travels in ALL Directions. Example: Sound waves reflect off of hard surfaces and form echoes. 3)Sound

5. Waves: (definition) A disturbance that carries energy from place to place. Example: Ultraviolet rays are carried to the Earth by waves of energy

6. Medium: The material through which a wave travels. Solids, liquids, and gasses make up the three mediums that sound travels through.

7. Volume: How loud or soft a sound is The more energy the sound wave has the louder the sound seems. The intensity of a sound is the amount of energy it has. You hear intensity as loudness. The higher the amplitude of the sound wave, the louder the volume; the lower the amplitude of the sound wave, the softer the volume. Lot of Energy/Tall Sound Wave=Loud Volume (High Amplitude) Low Energy/Short Wave=Soft Volume (low amplitude)

8. Frequency: The number of complete sound waves that pass a given point in a certain period of time. High Frequency Sound Waves=5 sound waves pass a given time and point (high pitch sound) Fast Vibrations!!! Low Frequency Sound Waves=3 sound waves pass a given time and point (low pitch sound) Slow Vibrations!!! High Frequency Sound Waves

9. Amplitude: The amount of energy in a sound wave. (How loud or soft a sound is) The more energy the sound wave has the louder the sound seems. The intensity of a sound is the amount of energy it has. You hear intensity as loudness. High Energy/Tall Sound Wave=Loud Sound(High Amplitude) Low Energy/Short Wave=Soft Sound (Low Amplitude)

10. Pitch: How high or low a sound is High Pitch Sound Waves: These sound waves demonstrate high frequency (several sound waves in a time and space) Fast Vibrations!! Low Pitch Sound Waves: These sound waves demonstrate low frequency (only a few sound waves in a given time and space)Slow Vibrations High Frequency Wave

11. Wavelength Wavelength: The distance between two compressions in a sound wave.

12. Echo: A sound wave that reflects off of hard and smooth surfaces. The Sound Waves bounced(reflected) off of the wall during our Bounce Lab and came back to the sound source (kids screaming) like a basketball bounces off of a wall and comes back to the passer.

13. Absorb Definition: To take in another substance. Example: Sound waves are absorbed (not reflected) by a bush and we do not hear an echo.

14. Reflect Definition: To bounce off of another object Example: Sound waves bounce off of hard and flat surfaces causing an echo

15. Sound Discrimination Definition: Being able to tell the difference between different sounds. Example: Telling the difference between the sound of a train and a plain.

16. Types of Musical Instruments Strings Brass Woodwinds Percussion Examples