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Science Chapter 9 Flashcards | StudBud
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Science Chapter 9
Science Chapter 9
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Answers
1
Label 31
wavelength
compression
rarefaction
2
A type of echolocation that locates items underwater
echo
ultrasound
acoustics
sonar
oscilloscope
3
Most sound waves gradually get louder as their energy is used up.
True
False
4
A sound wave carries particles of matter with it.
True
False
5
A machine that changes sound waves into electrical pictures seen on a graph.
sonar
oscilloscope
ultrasound
acoustics
echo
6
Most of the sounds we hear are a blend of several waves.
False
True
7
Label 29
rarefaction
compression
wavelength
8
The loudness or softness of a sound is called its _____
volume
pitch
frequency
timbre
9
The intensity of a sound is measured in ____.
decibels
compressions
hertz
frequencies
10
Sound moves the slowest through __________.
frequency
noise
gases
voice box
11
The number of waves that pass a point in one second is the __________ of a sound wave.
gases
voice box
frequency
noise
12
A disturbance that moves energy from place to place is called a _____.
wave
compression
noise
sound
13
Both singing and speaking are caused by vibrations of the vocal chords inside the ______.
voice box
gases
noise
frequency
14
Musical instruments that are played at the same pitch and volume still sound different because of their timbre.
True
False
15
A sound wave that bounces back toward its source and is heard again is called _______.
an echo
a wavelength
timbre
a compression
16
Rough, fuzzy surfaces usually _________ sound
high
mechanical
absorb
reflect
17
In 30 min, 5 cars passed over a bridge. In the next 30min, 12 cars passed over the bridge. What changed?
the frequency
Written Question
18
How has God designed sound waves so that a person can hear all the different instruments in music at the same time?
Written Question
God designed waves to occupy the same space without disturbing one another
19
The quality of a sound that distinguishes it from other sounds is called _____.
timbre
volume
pitch
frequency
20
Timbre is how high or low a sound is.
False
True
21
Smooth, hard surfaces usually _________ sound
absorb
mechanical
reflect
high
22
Objects that vibrate quickly have a __________ pitch.
reflect
high
mechanical
absorb
23
Sound waves that travel through matter are described as _______ waves.
reflect
absorb
mechanical
high
24
The echos of high-frequency sound waves to "see" inside a human body.
ultrasound
sonar
acoustics
echo
oscilloscope
25
Sound waves travel in all directions away from the source of the sound.
False
True
26
Sound moves through matter in waves
True
False
27
The science of sound
ultrasound
echo
sonar
acoustics
oscilloscope
28
Label 30
wavelength
rarefaction
compression
29
The pitch of a sound is related to its ______.
frequency
wavelength
timbre
volume
30
Most sounds we hear travel through _____.
water
plastic
air
wood
31
The part of a sound wave where the motion of each vibration pushes together some of the particles of matter is called
a compression
a cycle
a monsoon
acoustics
32
A harsh, unwanted, or surprising sound is often called _______.
frequency
noise
voice box
gases
33
A vibration that can be heard is called ______.
timbre
pitch
sound
frequency
