Is There a Dog That Can’t Bark?
Is There a Dog That Can’t Bark? Yes, there is one breed of dog, the basenji (buh SEN jee), that you’ll never catch “barking up the wrong t
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Sound
How Does a Smoke Detector Work?
How Does a Smoke Detector Work? There are two basic kinds of smoke detectors: ionization detectors and photoelectric detectors. A smoke alar
How Does the Sound Come from a Record?
How Does the Sound Come from a Record? The vibrations of sound made by a person’s voice or a musical instrument are recorded in the wavy gro
Why Does a Boy’s Voice Break?
Why Does a Boy’s Voice Break? When a boy’s voice breaks, it is because his voice box, or larynx, is suddenly growing larger. The larynx, l
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 f