Relative Densities of Liquids

10/14/2010

 
Do you remember what happened in this demonstration?  What is your explanation for this strange event?
ashley, erin,alicia,sasha
10/15/2010 02:34:41 am

that the chemichal on top was les dence than the liquid that formed tht bubble and the liquid on the bottom was dencer than the liquid on top and the liquid in the bubble

Christine and Jessie
10/15/2010 02:35:23 am

She first put half water in then slowing put alcohol in on the top and then she put the oil in with the pipette and made a bubble. That is so because water floats in water and in alcohol it sinks, so when it hit the water it stayed still!

Becky AND tori
10/15/2010 02:36:31 am

durring this demostain the oil[ is more desnt. so that's why when she dropped the oil in the water, it froze well not froze it stayed in the middle from the cooking oil and the water

SarahK
10/15/2010 02:37:10 am

In this demonstration, somebody took a dropper and filled with oil. They took the dropper and dropped the oil into a beaker of water. The oil stayed in one spot in the middle of the water. It looked like a big bubble of oil.

SarahKAnd LexiM
10/15/2010 02:40:26 am

In this demonstration, somebody took a dropper and filled with oil. They took the dropper and dropped the oil into a beaker of water. The oil stayed in one spot in the middle of the water. It looked like a big bubble of oil. This shows that the oil is more dense than the water.

Sarah
10/15/2010 02:41:14 am

I do remember what happend in the demo. In the beaker was water on the bottom and rubbing alcohol on the top. (Can bearly see it because both are clear liquids) Then Mrs. Laguna took cooking oil in a pipet in up it "in between" the two liquids. Because the rubbing alcohol is less dence then the oil, the oil sank. The water however is more dence then the oil so the oil floated up to the top. That is how in the video the oil stayed in the middle.

Rachel
10/15/2010 02:43:11 am

Yes, i remember this demonstration. The explanation for it is the beaker was filled with water half way FIRST, displaying the water to be on the bottom. Than, we took rubbing alchol into the same half filled beaker of water. Research shows, oil sinks in rubbing alchol but floats in water leaving a bubble inbetween each clear liquid in the beaker. In Scientific Phrasing, the oil is less dense in rubbing alchol causing the oil bubble to sink, though the oil bubble has more density in water, leaving it float. This was a strange but morst interesting experiment i have experienced this year in 8th grade science class. :)


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