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True or False: Sound doesn't need a medium to travel through (e.g. water, gas or an object).
False! It needs a medium in order to travel
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lifesaver
Give 5 points!
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shark
Other team loses 20 points!
Okay!
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fairy
Take points!
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25
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banana
Go to last place!
Oops!
15
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What is noise pollution?
It is when a sound gets too loud and lasts too long, with the possibility of causing damage to our ears.
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trap
No points!
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seesaw
Swap points!
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gift
Win 10 points!
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thief
Give points!
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15
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What vibrates through our throat as we speak or sing?
Our vocal chords
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15
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What are three examples of natural noise pollution?
Thunder, volcanic eruption, loud animals.
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Where is a place where you could hear an echo?
E.g. a cave, mountain
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What does pitch allow us to differentiate?
High and low sounds
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What is timbre?
Timbre is the quality of the sound that allows us to identify the source.
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Which decibel if exceeded can cause damage to our ears?
85 and above
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Our ears receive v_ _ _ _ _ _ _ _ _ and our brain interprets them. We call this sound.
Vibrations
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baam
Lose 5 points!
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gift
Win 20 points!
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rocket
Go to first place!
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thief
Give points!
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True or False: Sound travels faster in solids than liquids.
True
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True or False: Sound travels faster in gases than liquids.
False! Sound travels faster in liquids than gases.
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15
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What is intensity (define)?
Intensity is the volume of sound.
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What are the two types of noise pollution?
Man-made and natural
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