SME
Grade 8 Science · Problem type
Digital or analog signal?
Use this for “Why are digitized signals a more reliable way to store and send information?”
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How is the information carried?
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Assumptions
•
Both are signals; a digital one is read as only two levels.
•
Digital signals can be copied and sent many times without changing.
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Louder, or higher pitched?
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Electric charge, current and simple circuits
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Wave properties and the electromagnetic spectrum
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Louder, or higher pitched?
Use this for “How do the vibrations compare for a louder sound versus a higher-pitched one?”