Show:
Sound 1
Sound 2
EM Spectrum 1
EM Spectrum 2
Wave EXTRA
100
Sound passes through all of the following except: A) Solids B) Liquids C) Gases D)Air E)Diamonds F) Outer Space
F) Outer Space. Sound needs something to travel through. Space is empty. It is a vacuum.
100
List one way besides hearing that sound is used
Sonar Eco location Ultrasound images Music Communication Breaking up kidney stones and cleaning teeth
100
Electromagnetic waves are caused by A)the vibration of particles B)the vibration of electric charges C)the jumping between energy level of electrons in an atom D)both B and C
D) both B and C.
100
What type of radiation do humans emit? A) Radio B)Ultraviolet C) Light D)Infrared
Infrared radiation
100

Draw a compressional wave

teacher

200
Sound travels fastest in A) Air B)Water C)Concrete D)Outer space F) Sound travels the same speed in substances
C) Concrete Sound travels fastest in solids. Slowest in gases.
200
Why does sound travel faster in solids than in gases?
Because the particles in solids are closer together so the vibration can pass from one particle to the next more quickly
200
Which of the following is not an example of an electromagnetic wave? A) Xray B) Radiowave C) Ultraviolet rays D) Light E) Sound
E) sound is not caused by vibrating electric charges
200
What type of radiation is most useful for finding people missing in the woods?
Infrared
200
What type of gas does a hot solid, liquid or dense gas emit?
Continuous
300
Sound is a wave. There are two types of waves. Transverse waves and Longitudinal waves. Which type is sound? Draw it.
Longitudinal.
300
Draw a sound wave and label the two main parts
Compression Rarefraction
300
Electromagnetic radiation travels fastest in A)Solides B)Liquids C)Gases D)Empty Space
D) Empty Space
300
What type of EM wave allows us to listen to music in our cars?
Radio waves
300
What kind of spectrum is observed when a hot solid is surrounded by a thin gas?
Absorbtion
400
As the volume of sound increases, what part of the sound wave changes? A) Frequency B)Wavelength C) Amplitude D) Hz
C) The amplitude increases as the volume increases. This can be seen in more compact areas of compaction and less dense rarefractions
400
What is a decibel?
It is the unit of sound intensity or loudness. More decibels means louder sound
400
Explain how the sun warms the road.
The energy in the sun travels through space as EM wave. When the wave hits road, the energy causes the particles in the road to speed up.
400
What type of EM waves do cellphones depend on?
Microwaves
400
How do we know what the sun is made of?
By observing which parts of the spectrum are absorbed.
500
Pitch can be described as notes on the musical scale. Low notes have a low sounding pitch and high notes have a high sounding pitch What part of the wave is changing as the notes go up the scale? A) The decibels B) Wavelength C) Amplitude D)Frequency
D) Frequency As pitch goes up, the frequency of the wave goes up. High notes have more waves per second than low notes.
500
Why does a the siren of a police car have a higher pitch when coming towards you and a lower pitch when moving away from you?
The doppler effect. As the car comes at you, the sound waves are bunched together so the frequency is higher so high pitch
500
Which of the following has the shortest wavelength and the highest frequency? A) Radio waves B) Infrared C) Visible light D) Xrays
D) xrays
500
Which part of the spectrum do our eyes respond to?
Visible Light
500
Explain what causes atoms to emit different spectral lines
Electrons in the atom jump to higher energy levels and then fall back down. When they fall, energy is emitted. The color depends on how big the jump/fall is.