sound is energy that travels in the form of waves away from a vibrating object. what is sound?
TRANSCRIPT
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THE ENERGY OF SOUND
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Sound is energy that travels in the form of waves away from a vibrating object.
What is Sound?
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Sound waves travel through all three states of matter.
Can you identify the three states of matter in this picture?
Sound Travels
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Sound travels through the air.
Gas
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Sound travels through liquids, such as water.
To hear whales songs underwater click here
Liquid
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Sound travels through solids such as a floor, or dock.
Solids
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Sound cannot travel through a vacuum, which has no matter.
This includes space because there is no
matterin space.
Sound CANNOT Travel in Space
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Sound is a form of energy that travels in waves.
These waves are called “compression waves.”
Sound Waves
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Sound Waves
Video: How is Sound Made?
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Explore the Sound Waves
Explore the Sound Waves
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A scientist puts a bell inside a sealed glass jar. She makes the bell vibrate. Then, she sucks all the air out of the jar with a vacuum pump. She makes the bell vibrate again. Describe what the scientist probably heard when she made the bell vibrate each time. Explain your answer.
Let’s Experiment
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The highness or lowness of a sound is known as the pitch.
Pitch
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High Pitch
A high pitch has a high frequency. It has many ‘peaks’ in the wave.
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A low pitch has a low frequency. It has few‘peaks’ in the wave.
To learn more about pitch click here
Low Pitch
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Science and Technology > 3.1.4.C.1 Identify Observable Patterns
Science and Technology > 3.2.4.B.1 Recognize observable descriptors from each of the five senses
Science and Technology > 3.4.4.C.1 Identify characteristics of sound
For more on the PA Standards click here
Pennsylvania State Standards