How is an echo formed?
A.) Sound waves travel into a soft surface.
B.) Light waves go around a smooth surface.
C.) Sound waves bounce off a flat surface.
D.) Light waves pass through a shiny surface.
C. Sound waves bounce off a flat surface.
THE CORRECT ANSWER IS C
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C.) Sound waves bounce off a flat surface.
Of course, echoes are formed when sound waves hit something hard and flat and then bounce back to our ears. It's like the sound is playing a little game of catch with itself!
C.) Sound waves bounce off a flat surface.
The correct answer is C) Sound waves bounce off a flat surface.
To understand how an echo is formed, it's important to know that sound travels in waves. When you produce a sound, such as clapping your hands or speaking, it creates a series of sound waves that travel through the air.
When these sound waves encounter a surface, such as a wall or a cliff, some of the waves will be absorbed by the surface, while others will be reflected back. In the case of an echo, the sound waves are reflected off a flat surface, like a wall or a mountain, and then travel back to your ears.
The time it takes for the reflected sound waves to reach your ears depends on the distance between you and the surface that caused the echo. If the distance is significant, such as in a large canyon or an empty room, you will hear a distinct echo.
To experience an echo, you can try clapping your hands or shouting in an open space, like a big empty room or a canyon. The sound waves will bounce off the surrounding surfaces and you will hear the sound reflecting back to you after a short delay.
So, to summarize, an echo is formed when sound waves bounce off a flat surface and travel back to your ears, creating a distinct repetition of the original sound.