Are You Smarter Than a 4 th Grader?

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# Are You Smarter Than a 4 th Grader? - PowerPoint PPT Presentation

Are You Smarter Than a 4 th Grader?. 1,000,000. 500,000. 300,000. 5th Grade Topic 1. 5th Grade Topic 2. Are You Smarter Than a 4 th Grader? All About Sound!. 175,000. 100,000. 4th Grade Topic 3. 4th Grade Topic 4. 50,000. 3rd Grade Topic 5. 3rd Grade Topic 6. 25,000. 10,000.

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### Are You Smarter Than a 4th Grader?

1,000,000

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• If Mrs. B was plucking a string on her guitar and she wanted to create a higher pitch sound, what would she need to do to the string?
• Mrs. B would need to tighten the string on the guitar by turning the tuning key. Once Mrs. B tightened the string, the string would create a higher pitch.

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• Define wavelength. How do we measure it?
• Wavelength measures the actual length of a wave. We measure wavelength by looking at the distance from either crest to crest or trough to trough.

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• Which pitch has the slowest vibration and the lowest frequency? A low, medium, or high pitch?
• A low pitch has the slowest vibration and the lowest frequency.

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• How does sound travel? Describe where sound starts and how it travels to its ending point.
• Sound starts at a sound source, and travels though a medium (solid, liquid, or gas) and into our ear. The sound then bounces off of our eardrum, and then the nerves in our ear transport the sound to our brain, which then processes the sound.

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• Sound is made when an object or material vibrates.

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• What is amplitude? How do we measure amplitude on a sound wave?
• Amplitude measures the intensity of a sound.
• We can determine a sound waves amplitude by looking at the height of the wave. The higher the amplitude, the louder the sound, and vice versa.

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• If Daniel had a thin rubber band and Emma had a thick rubber band and both of them plucked their rubber bands, what would the difference be in sound?
• Daniel’s thin rubber band would create a higher pitched sound. (Faster vibrations.)
• Emma’s thicker rubber band would create a lower pitched sound. (Slower vibrations.)

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• Where are the crest and the trough located on a wave?
• The crests are located at the high points of a wave, and the troughs are located at the low points of the wave.

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• Pitch is how high or low a sound is. A flute would be an example of an instrument that creates a high pitch sound, and a tuba would be an example of an instrument that creates a low pitch sound.

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• What is frequency? How do you create high frequency? How do you create low frequency?