1) Sound waves are patterns of disturbance caused by energy traveling through a medium like air or water from a vibrating object, creating variations in pressure. 2) Sound waves are called longitudinal waves because the medium's particles vibrate parallel to the direction of propagation. 3) Sound has many uses including entertainment, medicine, cleaning, generating electricity, and art and is an important aspect of human communication and understanding our environment.

1. Good morning
everyone!!!
We are the group 2
Presented by : Group 2

2. Good day friends today we
will discuss Sound Wave.
LET'S START EVERYONE!!!
Frianca

3. What is sound waves?
A sound wave is the pattern of disturbance caused
by the movements of energy traveling through a
medium ( such as air, water or any other liquid or
solid matter) as it propagates away from the source
of the sound. Sound waves are created by the
objects vibration and produce preassure waves like a
ringing phone.
Frianca

4. What are sound waves called?
Sound wave is called longitudinal wave because it is
produced by compressions and rarefactions in the
air. The air particles vibrate parallel to the direction
propagation.
Franz

5. What are sound waves used for?
Sound is an actual physical wave,we can manipulate
it to do something other than keep us entertained
during our work commute. It is also been used to
treat medical cinditions, clean, generate electricity
and make one of a kind artwork.
Franz

6. What is the importance of sound?
Sound is a crucial aspect of our everyday lives. Just
think about it - most of us communicate verbally, and
it's pretty hard to understand body language alone.
This makes sound the primary source of information.
Kim

7. What are the characteristics of a
sound waves?
Sound wave can be describe to five characteristics
and this are : wavelength, amplitude, timeperiod,
frequency and velocity or speed.
Kim

8. Whay frequency is sound waves?
The units of frequency are called hertz or Hz.
Humans with normal hearing can hear sounds
between 20hz and 20,000hz. Frequencies above
20,000hz are known as ultrasound.
Julianne

9. What affects the speed of sound?
The speed of sound in a medium is determined by
combination of the medium's rigidity ( or
compressibility in gasses) and it's density. The more
rigid ( or less compressibile) the medium, the faster
the speed of the sound . The greater the density of a
medium, the slower the speed of the sound.
Julianne

10. How fast can a sound travel?
On a standard day at a sea level static conditions,
the speed of a sound js about 760mph or 1000
feet/second.
Rashard

11. Can sound travel in the water?
While sound moves at a much faster speed in the
water than in air, the distance that sound waves
travel is primarily dependent upon ocean
temperature and pressure.
Rashard

12. Where is sound faster?
Solids
Sound travels fastest through solids. This is beacause
molecules in a solid medium are much closer
together than these in a liquid or gas allowing fact
,sound waves travel over 17 times faster through
steel than through air.
Joel

13. Why can't we hear underwater?
It's because the water is denser than air , since sound
waves travel faster underwater than in air , it is much
harder for us to detect where they are coming from .
Our bodies have something called bone conductivity.
Rhian lei

14. Does wind carry sound?
Changing wind speeds above the ground cause
sound waves to bend toward or way on earth.
Carl nathan

15. Can sound travel in empty space?
Sound can't be carried in the empty vacuum of space
cause sound waves need a medium to vibrate
through such as air and water.
Wayne

16. Is sound louder in air or water?
Sound travels in water very fast compared with air
cause water particles are packed in more densely.
Manny

17. How does the sound made?
Sound is created by a vibrating objects, the
compression and expansion of the air on either side
of the vibrating membrane produces differences in
air pressure.
Brian

18. Book summary
Reflection of sound, echo is a property of sound wave.
Once a echo occurs, it only meansbthat the sound
produced has bounced back . Refraction of sound,
refraction occurs when a wave travels from a dense to
a less dense media. Sound travels faster in cool air
than warm air because cool air is denser than warm
air. Diffraction of sound , diffraction occurs can be
easily observe by looking in the opening or size of the
obstacle, if the sound wave is bolcked,
Frianca

19. Continuation :
That sound wave will look for a new path . If the
sound wave is blocked with a small opening , the
sound will pass through the opening and spread
again. Characteristics of sound . There are three
characteristics of sound pitch, loudness, and quality .
Pitch refers to higness and lowness of a sound.
Loudness of sound produced by vibrating object
depends in intensity of force that makes the object
vibrate.
Aaron

20. Continuation :
The quality of sound ( or the timbre) sets the
difference of one tone from another . Speed of
Sound , the speed of sound depends on the medium
the wave pass through it's speed at sea level 344m/s
yet this may vary if affected by some factors.
Detecting sounds, when sound hits an object , it can
cause the object to vibrate
Rashard

21. This are some of examples that produces
sounds.
Frenz

22. That's all for our
discussion!!
That ends our discussion about Sound waves

23. Friends, have you listened to our discussion?
Well then let's test you're skills.

24. Quiz 1 :
1.

25. Quiz 2 :

26. Group 2 members:
Leader: Frianca
Sec: Franz
Other members:
Aaron
Rashard
Julianne
Manny
Carl nathan
Wayne
Joel
Rhian lei
Brian
Frenz

27. Thanks for listening
to our presentation
Again we are group 2