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Changing Densities Worksheet
A. Grape Races
Calculate the change in salinity when you add 2.5 g of salt to 250 ml of water. Record each change in salinity on the table below.
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Salinity |
Grape Race Time |
(freshwater) |
ppt |
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ppt |
|
|
Ppt |
|
(normal seawater) |
ppt |
|
|
Ppt |
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|
Ppt |
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|
ppt |
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B. Egg Suspension
Record your methods for floating your eggs. If your procedure worked, write down the reasons why. If it didn't, speculate as to why it didn't work.
C. Grapefruit Floating
What tank does the grapefruit float in? What can you say about the density of the grapefruit compared to the grape or the egg?
Downloadable PDF of this teaching aid.
Back to the Changing Currents lesson plan.
Author: Jennifer Provencher, 2007. All content has been created by the Bamfield Marine Sciences Centre, or used with permission of the owner where indicated. Material may be used for education and teaching purposes, but not for resale or paper distribution without permission from BMSC or the owner of the image. |