8L sound and hearing
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| amplitude | Half the height of a wave.
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| cochlea | The part of the ear that changes vibrations into electrical impulses.
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| decibel (dB) | Unit for measuring the loudness of a sound.
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| eardrum | A thin membrane inside the ear which vibrates when sound reaches it.
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| frequency | The number of waves each second.
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| hertz (Hz) | The unit for frequency. 1 hertz means one wave per second.
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| impulse | Electrical signal carried by a nerve cell.
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| intensity | The loudness or volume of a sound.
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| loudness | How loud a sound is; the volume of a sound.
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| noise | Unpleasant sound.
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| oscilloscope | An instrument which shows a picture of a wave on a screen.
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| pitch | How high or low a note sounds.
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| sound intensity meter | A meter which measures the loudness of a sound.
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| threshold of hearing | The quietest sound that can be heard.
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| vacuum | A completely empty space with no particles.
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| vibrate | Move backwards and forwards.
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| wave | A way of transferring energy. Waves can be side to side or backwards and forwards movements.
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| wavelength | The distance between the top of one wave and the top of the next.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
johncl
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