What Makes an Echo?
What Makes an Echo? An echo is a sound that we hear after it is reflected, or bounced back, from some object. When we shout, sound waves travel through the air in all...
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How Deep Is the Deepest Spot in the Ocean?
How Deep Is the Deepest Spot in the Ocean? Off the island of Guam in the Pacific Ocean is a very deep, crescent-shaped trench called the “Mariana Trench.” Near the...
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Can Snakes Hear?
Can Snakes Hear? Snakes have no ears on the outside of their heads. This means they do not hear sounds as you do. So shouting and loud noises do not perturb them. But...
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What Causes Thunder?
What Causes Thunder? Thunder is caused by lightning. During a thunderstorm, electrical charges build up in the clouds. When a charge becomes strong enough, there is a...
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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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