Circle the letter of the best answer to the question below
What is Sound
a) The oscillation of matter
b) Electricity
c) Energy
d) Both a and c
Answer : D
When a wave travels through a medium ______.
1. particles are transferred from one place to another
2. energy is transferred in a periodic manner
Answer : 3
3. energy is transferred at a constant speed
4. none of the above statements is applicable
Bats detect the obstacles in their path by receiving the reflected ______.
1. infrasonic waves
2. radio waves
3. electro-magnetic waves
4. ultrasonic waves
Answer : 4
When sound travels through air, the air particles ______.
1. vibrate along the direction of wave propagation
2. vibrate but not in any fixed direction
3. vibrate perpendicular to the direction of wave propagation
4. do not vibrate
Answer : 1
The amplitude of a wave is ______.
1. the distance the wave moves in one second
2. the distance the wave moves in one time period of the wave
3. the maximum distance moved by the medium particles on either side of the mean position
4. the distance equal to one wave length
Answer : 3
Which of the following is not a characteristic of a musical sound?
1. Pitch
2. Wavelength
3. Quality
4. Loudness
Sound waves do not travel through
1. solids
2. liquids
Answer : 4
3. gases
4. vacuum
Answer : 2
Sound waves are
1. longitudinal
Answer : 1
2. transverse
3. partly longitudinal and partly transverse
4. sometimes longitudinal and sometimes transverse
The speed of sound in medium depends upon
1. amplitude
2. frequency
3. wavelength
4. properties of the medium
Answer : 4
Which of the following will remain unchanged when a sound wave travels in air or in water?
1.
Amplitude
2.
Wavelength
3.
Frequency
4.
Speed
Answer : 3
Sound and light waves both
1. have similar wavelength
2. obey the laws of reflection
3. travel as longitudinal waves
4. travel through vacuum
Answer : 2
Write your answers on the lines below
2. Explain why sound travels faster through water than through air
Because the particles are much closer together and they can quickly transmit ocillation energy from one particle to the other
3.As it travels farther from its source, a sound wave spreads out. How do you think this affects its
amplitude?
A sound wave traveling through a static medium and it decreases in both amplitude and frequency cover any given
distance seperate from its origin
4. Not everyone has the same definition of what noise is and what music is. Think of an example of a
noise that has a pattern. Could it be considered music? If So, in what way.
Music and noise are both mixtures of sound wave of different frequencies
5. True/False: Sound travel better through gases than they do through solids
6. Define sound
: energy that travels in waves away from a oscillating object
7. Define medium
: materials like solid , liquid and gas through which sound can travel
8. Define amplitude : The distance between crest and trough of a wave determine loudiness
9. Define Decibel : unit of measurements for sound
10 Define frequency
: The number of wave that pass a point in a certain amount of time .
False