Sound and Sound Waves 5 th GRADE OES

I Can… Identify the properties and characteristics of a sound wave Describe the properties and characteristics of sound waves Discover how sound waves work

Monday’s Agenda Introduction to Sound and Sound Waves KWL Chart Sound and Sound Waves presentation Study Jams Video Write vocabulary from presentation and video

SOUND and SOUND WAVES Sound is the vibration of any substance such as solid, liquid, and gas. When these substances vibrate, or move rapidly back and forth, they produce sound. The only place in which sound cannot travel is in a vacuum or space! Sound is measured in decibels of sound pressure.

The vibrations that produce sound are not the result of an entire volume moving back and forth at once. Instead, the vibrations occur among the individual molecules of the substance and the vibrations move through the substance in sound waves As sound waves travel through the material, each molecule hits another and returns to its original position.

Sound waves are longitudinal (compression) waves The rapid back-and-forth vibration of an object creates the longitudinal or compression waves of sound. Longitudinal waves are waves that oscillate in the same path that the sound wave is moving.

Sound mediums A medium is a material that sound, a form of energy, NEED to transfer Speed of sound Solid : Fast speed Liquid : Medium speed Gas : Slow Speed Standard Temperature and Pressure = 3.31 x 10 2 m/s Vacuum : No Sound (outer space)

Characteristics and Properties of Sound Waves There are several basic characteristics or properties of sound waves: wavelength, frequency, pitch, amplitude, and speed (velocity)

Wavelength is the distance between any point on a wave and the equivalent point of the next phase. Literally, the length of a wave.

Frequency is the number of times the wavelength occurs in one second. Measured in kilohertz (Khz), or cycles per second. The faster the sound source vibrates, the higher the frequency.

Pitch How the brain interprets the frequency of an emitted sound is called the pitch. We already know that the number of sound waves passing a point per second is the frequency. We already know that the number of sound waves passing a point per second is the frequency. The faster the vibrations the emitted sound makes (or the higher the frequency), the higher the pitch. Therefore, when the frequency is low, the sound is lower.

The amplitude is the strength or power of a wave signal. The "height" of a wave when viewed as a graph. Higher amplitudes are interpreted as a higher volume while lower amplitudes have lower volume. The amplitude of a sound is known as its loudness.

Speed The speed of sound refers to how fast the disturbance or sound is passed from particle to particle. It can also be defined as the distance that a point on a wave travels per unit of time, it is often expressed in units of meters/second.

Study Jams Video TIME! Students be sure to copy the vocabulary from the movie. You may add on to the words and definitions you already have.

Tuesday’s Agenda Bellwork: Write the letter next to the correct word! Answers ONLY. Review yesterday’s lesson and vocabulary Sound worksheet

Wednesday’s Bellwork ____1. Wavelength a. strength or power of a wave signal ____2. Frequency b. how fast the disturbance or sound is passed from particle to particle ___3. Amplitude c. the number of times the wavelength occurs in one second ___4. Speed d. length of a wave ___5. Pitch e. How the brain interprets the frequency of an emitted sound

Wednesday’s Agenda Sound Waves RAP! Bill NYE! Sound Stations ** lesson-plans/the-phenomenon-of-sound-waves.cfm (Teachers: Open this up before stations! )

Sound Stations There are 5 stations. Each group or tribe will go to each station and complete the activity. Each student will receive a worksheet for each station. Answer the questions on each worksheet for every station that you complete. MAD SCIENTISTS TIME!! MAD SCIENTISTS TIME!!

Thursday’s Agenda Continue Sound Stations MAD SCIENTISTS TIME!! MAD SCIENTISTS TIME!!

BELLWORK Directions: In your Science notebooks, number your paper 1-5. Then FILL IN THE BLANK SPACES. You must write the whole word. THE PROPERTIES/CHARACTERISTICS OF SOUNDWAVES ARE: 1. __A__ __ L __ __ __ T __ 2. A __ __ __ __ __ __ __ E 3. __ P __ __ __ 4. F __ __ Q __ __ __ __ Y 5. __ I __ __ __

5.3.2 Know the properties/characteristics of light and sound waves I Can… Identify the properties and characteristics of a sound wave Describe the properties and characteristics of sound waves Discover how sound waves work

Friday’s Agenda Continue Sound Stations MAD SCIENTISTS TIME! Mini Books (compile worksheets from stations) Update KWL Charts Review the properties of sound waves