Vocab 20
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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| Compression | an area ina sound wave where air molecules are pressed together
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| Pitch | how high or low a sound is
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| Sound | a form of energy produced by vibration objects
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| Vibration | to move back and forth rapidly
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| Volume | the loudness of a sound
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| Wavelength | the distance between one crest and the next crest of a sound wave
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| Reflection | the bouncing back of light rays from a surface
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| Refraction | the bending of light rays as they move from one material into another
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| Echo | the repeating of a sound caused by the reflecting of sound waves
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| Sonar | a device used for detecting the presence and location of objects using sound waves
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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.
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.
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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