Monday, August 26, 2013

observing density


Can Density [the amount of mass something has per unit of volume (mass/volume)] be observe in the same way one can observe other properties of matter? It sure can.  Let's have a look with this little experiment. 


What you need:
large clear jar
water
oil
honey or syrup
solids (such as a cork, a small plastic toy, coin, grapes, etc.)


What to do:
1.  Measure 1 cup of oil, 1 cup water, and 1 cup honey or syrup.  


2.  Add the liquids to the jar one at a time.  The order does not matter.  


3.  Let the liquids sit for 3 minutes and observe them.


4.  Add the solids one at a time. Wait a few minutes and then observe the solids.


You can see density!  The liquids separate and form layers based on their density and the solids float, sink, or do nothing based on theirs! 

We used a cork, a button, a green piece of chalk, a grape, a penny.  And then we tried wood, a rock, & different sized grapes.

2 comments:

  1. You have the best ideas. I love the way you added items to the solution and could see how dense they are. Awesome!

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  2. A simple way to explain density that really works. Love it #hobbies and handicrafts

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