Lab report bubbles

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  • Publicado : 9 de octubre de 2010
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PURPOSE
To test the hypothesis that bubble making can be affected by adding sugar or salt to a bubble-blowing mixture.

INTRODUCTION
A bubble is a spherical mass of gas surrounded by a liquid orsolid. Scientists refer to them as  "minimal surface structures."  This means that they always hold the gas or liquid inside of them with the least possible surface area.  The geometric form with theleast surface area for any given volume is always a sphere, not a pyramid or a cube or any other form. Similar to the way we perceive the colors in a rainbow or an oil slick, we see the colors in abubble through the reflection and the refraction of light waves off the inner and outer surfaces of the bubble wall. You can't color a bubble since its wall is only a few millionths of an inch thick. Abubble reflects color from its surroundings.

MATERIALS

3 Plastic drinking cups
Liquid dish detergent
Measuring cups and spoons
Water
Table sugar
Table salt
Drinking strawPROCEDURE
Label three drinking cups 1, 2, and 3. Measure and add one teaspoon of liquid dish detergent to each cup. Use the measuring cup to add two thirds of a cup of water to each drinking cup. Thenswirl the cups to form a clear mixture. CAUTION Wipe up any spills immediately so that no one will slip and fall.
Add a half teaspoon of table sugar to cup 2 and a half teaspoon of table salt to cup 3.Swirl each cup for one minute.
Dip the drinking straw into cup 1, remove it, and blow gently into the straw to make the largest bubble you can. Practice making bubbles until you feel you havereasonable control over your bubble production.
Repeat step 3 with the mixtures in cups 2 and 3.

ANALYZE AND CONCLUDE
Yes, the mixture in cup #2 didn’t produce any bubbles at all, while the mixture incup #1 produced a lot of bubbles.
No, the bubble production in the mixtures of cups #1, and #3, were almost the same.
Table sugar made the mixture reduced the production bubbles in the mixture,...
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