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Related Flashcards
Cards In This Set
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What is sound?
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Sound is anything that can be heard and is a form of energy.
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Why do we use sound?
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We use sound to communicate with others to find out about what’s going on around us.
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What is energy?
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Energy is the ability to make things move. It is needed to start the vibrations that make sound.
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How is sound made?
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Sound is made by the vibrations of an object. To make a sound, all or part of the object has to vibrate.
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What are vibrations?
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Vibrations are the back and forth movements of an object. Vibrations can be powerful, weak, fast or slow.
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What are sound waves?
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Sound waves are vibrations that make sound.
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How do sound waves travel?
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Sound waves travel away from its source in all directions.
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What does sound travel through?
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Sound travels through solids, liquids and gases.
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How does sound travel through solids?
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In solids sound travels the fastest because molecules are close together.
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How does sound travel through liquids?
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In liquids sound travels the second fastest because the molecules are farther apart in liquid than solids.
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How does sound travel through gases?
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In gases sound travels the slowest because the molecules are the farthest apart.
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What is an echo?
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An echo is sound waves bouncing back from a hard surface. When it bounces back it is reflected an sounds like the original sound.
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What is volume and pitch?
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The loudness or softness of a sound is volume. The highness of lowness of a sound is pitch.
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Define amplitude.
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A loud sound has a high amplitude. A low sound has a low amplitude.
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How is sound measured?
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Sound is measured by the number of cycles the sound wave makes in a second.
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