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15
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What is the minimum frequency for a sound to be considered ultrasound?
20,000 Hz
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15
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What happens when light travels from air into water?
It slows down and bends
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15
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What type of sound is below the human hearing range (below 20 Hz)?
Infrasound
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15
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A wave has a frequency of 250 Hz and a wavelength of 4 m. Calculate its speed?
1000 m/s
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15
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Explain why a pencil appears bent when placed in a cup of water.
refraction
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15
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If a wave has a wavelength of 2 m and a frequency of 5 Hz, what is its speed?
10 m/s
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15
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What is an echo?
A sound that is reflected back
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15
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If the speed of sound in steel is 5000 m/s, how long will it take for a sound wave to travel 2 km through steel?
0.4 seconds
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15
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A sound wave with a high frequency has _______ pitch
high
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15
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What is the correct order of visible light colors in a rainbow?
Red, Orange, Yellow, Green, Blue, Indigo, Violet
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monster
Reset all scores!
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seesaw
Swap points!
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gift
Win 15 points!
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banana
Go to last place!
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boom
Lose 50 points!
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fairy
Take points!
5
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25
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fairy
Take points!
5
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25
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lifesaver
Give 25 points!
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15
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What type of wave is a sound wave?
Longitudina
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monster
Reset all scores!
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gold
Win 50 points!
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shark
Other team loses 25 points!
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baam
Lose 20 points!
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15
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What does the amplitude of a sound wave determine?
loudness
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15
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What happens to the speed of a wave if the frequency increases while the wavelength remains the same?
Increases
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