Sound Waves & EM Waves

 Chapter 14  Recall questions  Vocabulary  Chapter 17  Recall questions  Vocabulary  Chapter 19  Recall questions  Vocabulary Layer C

1.EM mural (3 people to a mural) 2.Uses of sound (use Ch. 16 online): 3.EM Wave Glogster. See me to pick wave. 4.Ear structure Model (Use Ch.15 online) Extra Credit:  Current Events Article and Analysis Layer B

 Play an instrument for the class – 3 points. (2 points extra credit for MAKING one)  Describe the following  Describe the parts of the instrument and how each part contributes to the sound (What is actually vibrating? How is the sound amplified?)- 5 points.  How are we able to HEAR the music? (from beginning – vibration of instrument- to end –our inner ear) – 5 points  How does your instrument produce a change in pitch? -2 points  How does your instrument produce a change in volume? – 2 points  Presentation is clear, in appropriate voice and heard by all students – 3 points  TOTAL = 20 Homework project points Layer A – Music Project

How sound Begins…

Speed of sound

Loudness / Intensity

Pitch / Frequency

Doppler Effect

EM Wave Basics

Radio and TV

Microwaves Microwaves absorbed by water, fats and sugars NOT absorbed by plastic, glass or ceramics Once the wave is absorbed transferred to atomic motion (Kinetic energy!) which creates heat. Oven = heat from the outside in Microwave = heat everywhere, all molecules excited together hotspots: wave interference Air in microwave is room temperature (can’t make a crust)

Color

Color Blindness

 Cone cells adapt to over- stimulation of light and lose sensitivity  These cone cells become tired and stop firing, whereas the neighboring cone cells fire After image

After Image

X-rays and Gamma rays