Which weighs more, a quart of whole milk
or a quart of skim milk?
A. Write down your response—include an explanation.
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B. Density Blocks—measure and compare the density of several plastic blocks.
 Which blocks are the most dense?
 Which blocks are the least dense?
 Do any of the blocks have the same density?
 Will any of the blocks float in water?
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C. Design a Floatation Device for plastic army men
 Why don’t they float?
 Why does the foam help them float?
 What’s the highest density (man + foam) you can make that still floats?
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D. Mystery Object Density Challenge
 Use the clues to find the mass, volume, and density of the objects
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E. Diet vs. Regular Soda
 Do they float?
 Which one is more dense and why?
 Can you find their densities?
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F. Resources and Discussion
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Plastic Density Blocks
http://www.flinnsci.com/store/Scripts/prodView.asp?idproduct=15850
David Letterman “Will it Float?”
https://www.youtube.com/watch?v=dSyQZjw3h74
Ed Helper Density boxes (subscription)
http://edhelper.com/logic/Logic64.htm
Life Preservers https://www.nsta.org/store/product_detail.aspx?id=10.2505/9781936137190
Milk Facts
http://www.mep.net.au/foodlab/FL_5/MEP_DMA35_dairy.pdf
Donia Spott
[email protected]
Powhatan Junior High School
Powhatan, Virginia