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45 Cards in this Set
- Front
- Back
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What is sound?
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energy that is all around us
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What is sound?
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energy that is all around us
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How is sound produced?
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vibrations
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What must be present for sound to be produced?
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matter
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How do musical instruments make sound?
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they vibrate and resonate
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How does sound travel?
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waves
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What are the three basic parts of a wave?
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crest, trough, wavelength
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Which is the highest point of a wave?
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crest
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Which is the lowest point of a wave?
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trough
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What is a wavelength?
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distance between two side by side crests
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What makes a sound become higher?
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frequency increases
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What is sound?
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energy that is all around us
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How is sound produced?
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vibrations
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What must be present for sound to be produced?
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matter
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How do musical instruments make sound?
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they vibrate and resonate
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How does sound travel?
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waves
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What are the three basic parts of a wave?
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crest, trough, wavelength
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Which is the highest point of a wave?
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crest
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Which is the lowest point of a wave?
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trough
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What is a wavelength?
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distance between two side by side crests
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What makes a sound become higher?
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frequency increases
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What do we call the number of vibration in a unit of time?
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frequency
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What do we call the highness or lowness of sound?
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pitch
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Of the three states of matter, which do sound waves travel through the slowest?
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gas
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Of the three states of matter, which do sound waves travel through fastest?
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solid
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Why doesn’t sound travel quickly through gas?
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molecules are farther apart
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Why does sound travel faster through solids than gas or liquid?
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molecules are closer together
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How do humans, dogs, and bats make sounds to communicate?
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we move air across vocal cords
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How do whales make sounds to communicate?
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pass air through sacs in their heads
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What is hearing?
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detection of sound
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What are the two kinds of waves that affect our lives every day?
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sound waves and light waves
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How are sound and light waves similar?
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both sound waves and light waves have crests, troughs, and wavelengths
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What is the difference between a crest and a trough?
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crest is the top of the wave and the trough is the bottom of the wave
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How are waves measured?
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by wavelengths, from crest to crest or trough to trough
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How do light waves travel?
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straight paths called rays
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Do light waves need matter to travel?
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no
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What four things can a light ray do when it hits an object?
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reflect, refract, transmit, absorb
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How do we know we can see light waves?
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we see color
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What color is the longest wave?
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red
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What color is the shortest wave?
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violet
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What colors make up the visible spectrum?
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Red, orange, yellow, green, blue, indigo, violet (ROY G BIV)
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What can we use to see the different colors that make up white light?
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prism
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What happens to white light when it passes through a glass prism?
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bends
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What is the bending of light called?
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refraction
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How does a rainbow occur?
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Light passes through tiny water droplets, the droplets act like a prism
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