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Density Column

By Kaylyn Stockdell
by

Kaylyn Stockdell

on 24 January 2012

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Transcript of Density Column

Purpose: To see how density relates to everyday objects. Hypothesis: If I pour substances in a glass from highest density to lowest then a column will be made and there will be 7 easily identifiable layers. Experimental Design:
1. Subject: Density
2. Variable: The different substances
3. Test Method: Quantitative
4. Expected Outcome: The substances with the highest density will be on the bottom and the ones with the lowest density will be on top. The substances will not mix and there will be 7 layers.
5. Control: There isn’t a control. I’m not comparing anything. Why this SHOULD work:
The same amount of two different liquids will have different weights because they have different masses. The liquids that weigh more (have a higher density) will sink below the liquids that weigh less (have a lower density).

Density is basically how much "stuff" is smashed into a particular area or a comparison between an object's mass and volume. Density = Mass divided by Volume. If the mass of something increases but the volume stays the same, the density has to go up. If the mass decreases but the volume stays the same, the density will go down. Lighter liquids (like water or rubbing alcohol) are less dense than heavy liquids (like honey or maple syrup) and so float on top of the more dense layers. Conclusion:
My experiment did not work. After everything was poured in the honey, maple syrup, and the dish soap are clearly visible. The water and rubbing alcohol have mixed. The lamp oil and vegetable oil have also mixed.

The issue with my experiment was the glass cylinder I had was not tall enough for all 7 substances to fit. So I had to work with the ounces to get the substances to fit. I eventually used 3 oz of the honey and maple syrup and 4 oz of dish soap, water, vegetable oil, rubbing alcohol, and lamp oil. Procedure:
1. Measure 8 oz of each liquid into the 9 oz cups.
2. Color the liquids for a better effect. Color the water and rubbing alcohol. (I colored the water blue and rubbing alcohol green)
3. Slowly pour each substance into the cylinder from highest to lowest density. 1. Honey 2. Maple Syrup 3. Dish Soap 4. Water 5. Vegetable Oil 6. Rubbing Alcohol 7. Lamp Oil Materials:
Food Coloring
9 oz Cups
Glass Cylinder
Water
Lamp Oil
Honey
Rubbing Alcohol
Maple Syrup
Vegetable Oil
Dish Soap Plus:
1. Fun/colorful experiment
2. Easy
3. Not super expensive Delta:
1. Cylinder not big enough so had to rework the measurements
2. Messy
3. Some of the substances ended up mixing. Density Column
By Kaylyn Stockdell After the vegetable oil is poured. You can see the honey, syrup, water, and dish soap and oil clearly. The bubbles are from the water and dish soap mixing. After the rubbing alcohol is poured.
You can clearly see the honey, syrup, and dish soap. The alcohol and water have mixed.The vegetable oil is above the rubbing alcohol. After the rubbing alcohol is poured. Pict 2. After the lamp oil is poured. The lamp oil and vegetable oil have mixed. Water: 1.00 g/ml
Dish Soap: 1.05 g/mL
Honey: 1.36 g/mL
Lamp Oil: 0.8 g/mL
Vegetable Oil: 0.92 g/mL
Maple Syrup: 1.3 g/mL
Rubbing Alcohol: .81 g/mL
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