How Does My Voice Go over the Telephone?
How Does My Voice Go over the Telephone? A basic phone consists of a microphone (which you talk into), an apparatus to change your voice into electric signals, a means...
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What Causes an Echo?
What Causes an Echo? An echo occurs when sound bounces back from an object. When we speak or shout, sound waves travel through the air. We first hear the sound when the...
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How Does Electricity Travel Through a Wire?
How Does Electricity Travel Through a Wire? Electricity comes into our buildings on copper or aluminum wires from giant electric generators in power stations. The...
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Why Do We See Lightning Before We Hear Thunder?
Why Do We See Lightning Before We Hear Thunder? Lightning usually reaches our eyes before thunder reaches our ears because light travels faster than sound. Light...
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How Do You Read a Paper Map?
How Do You Read a Paper Map? Most kids don’t think much about exactly how they get from Point A to Point B during a trip. Once you start navigating the world on...
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