Secchi Disk
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Secchi Disk:
Imagine trying to read a book in a dimly lit room where the words become difficult to decipher due to the lack of light. Similarly, a Secchi disk is used to gauge how "lit" or clear water is, by measuring how far down into the water you can still see the disk before it disappears from view. Just like needing enough light to read a book clearly, the Secchi disk helps determine how "readable" or transparent the water is by assessing how deep light can penetrate, indicating water clarity or turbidity.

Practice Version

Secchi Disk: A white circular disk used to measure water transparency or turbidity in bodies of water. Secchi disk. It is a tool scientists use to see how clear or murky water is.