sound waves & em waves. chapter 14 recall questions vocabulary chapter 17 recall questions ...
TRANSCRIPT
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
Infrasound&
Ultrasound
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 inMicrowave = 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