1. Interactions of Sound Waves p. 42-47
Part I
Vocabulary:
Echo
Echo location
*Sonar
Ultrasonography
Interference
a. *Constructive interference
b. *Destructive interference
*Mach I
7. *Supersonic
Sonic boom
Standing Wave
9. Resonance
Chapter 2
Section 3

2. Echo p. 42
A reflected
Sound
Wave

3. Echolocation p. 43 The process of using reflected
sound waves to find objects

4. Bats
Echolocation p. 43
Several types of animals use echolocation, including but not limited to: Dolphins, Shrews, most bats and most whales.
Also, two bird groups use their echolocation to navigate through caves. Echolocation is used by animals who usually can't see very well, or they live in an environment that is hard to see in the first place. (For example, the oceans.)
They use it to call out, and the echoes of the calls are used to navigate around in their environment. It's also used to hunt as well as navigate.
Dolphin
Beluga
Short-tailed shrew

5. Echolocation Technology p. 43
People use echoes to locate objects underwater
Sonar: Sound Navigation and Ranging

6. Ultrasonography p. 44 Ultrasound Medical procedure that uses echoes to
“see” inside a patient’s body
Ultrasound
Less harmful to human tissue than x-rays

7. Sound Wave Interference
p. 44
Below is a
description of
the two types of
sound waves. Do you know what they are?
Similar instruments play the same notes increasing
the amplitude resulting in louder sounds is called
Constructive
Interference
When sound waves reflect off walls and interfere
with the sound decreasing the amplitude and
softening the sound
Destructive
Interference

8. Interference and the Sound Barrier p. 45
Mach 1
The speed of sound
Supersonic
Speeds faster than the speed
of sound
Sonic Boom
The explosive sound heard
When a shock from an object
traveling faster than the speed
of sound reaches a person’s ears.

9. Standing Wave p. 46 A pattern of vibration that simulates
a wave that is standing still
A standing wave is a wave that remains in a constant position

10. Resonance Pages 46 and 47
A phenomenon that occurs when two objects naturally vibrate at the same
frequency; the sound produced by one object cause the other object to vibrate.

11. Resonance pages 46-47
Wind instruments use the mouth piece to make vibrations
inside the instrument forming a standing wave and amplifying its
sound.
Stringed instruments resonate as the strings vibrate. This
vibration creates standing waves inside the body of the guitar and the sound is amplified. The body of the guitar resonates when strummed.

12. Resonance in Musical Instruments

13. Part II
Other Types of Waves
Seismic Waves
Solar (light) Waves

14. Light is electromagnetic radiation that is visible to the human eye
Light Waves
Light is electromagnetic radiation
which is a wavelength
that is visible to the human eye

15. Visible light
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.

16. produced within the Sun? Nuclear Reactions take
How is light and heat
produced within the Sun?
Key Ideas!
Nuclear Reactions take
place in the Sun
Only a tiny fraction
of light energy
from the Sun
reaches Earth
That light energy is
transformed to heat
energy here on Earth

17. Now lets take a look at another type of wave which is very common
on Earth
The Seismic
Wave

18. A wave generated either artificially or by an earthquake that travels
Seismic Wave
A wave generated either artificially
or by an earthquake that travels
through the Earth.
P-Wave
(Longitudinal Wave)
Primary
S-Wave
(Transverse Wave)
Shear or side to side
(Surface Wave)
Surface Wave

19. P-Wave is the first energy wave to occur after the earthquake has occurred. This is a compression type of wave. S-waves are the second type of wave to results and finally the surface wave which causes the most damage.

20. The following clip analyzes earthquakes
and the seismic waves they produce

21. Seismic Waves

22. You will then summarize those notes in two whopper
Seismic waves are waves of energy which happen in and on the Earth. They are usually caused by earthquakes, but can also be man made!
How do we measure them and what can we do to help protect ourselves from them?
You are to take 10 notes from the following video clip.
You will then summarize those notes in two whopper
style paragraphs
Just Kidding!!

23. Protecting Ourselves from
Seismic Waves