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