Lava lamp with oil and water
|Lava lamp with oil and water|
|Age Range||3-5 (PreK-K), 5-8 (grades 1-2), 8-11 (grades 3-5)|
|Group Size||small (1-5), medium (6-20)|
|Setup Time||medium (6-30 min)|
|Duration||medium (11-30 min)|
|Subjects||states of matter, water|
|Materials||water, oil, test tubes, alka seltzer tablets, food coloring|
|Alias||oil and water experiment|
|Presentation Style||interactive, student led|
Student will observe how water and oil don't mix. Add an alka seltzer tablet and you have a rudimentary lava lamp!
Oil and water do not mix. A tablespoon of water is heavier than a tablespoon of oil. This is the same effect observed when putting a cork or a rubber ducky into water- they float! Oil molecules are also hydrophobic (from the Greek meaning fear of water). Most familiar oils do not dissolve in water, instead the molecules cluster toward each other and then float up to the surface.Food coloring will mix with water but not with oil.
This Is How You Play
- Fill test tubes with oil and colored water.
- Let students drop food coloring on the oil and observe.
- Let students drop a piece of an alka seltzer tablet into the tube. Watch the mini lava lamp go!
- http://www.ccmr.cornell.edu/education/ask/?quid=678 - Source of oil and water facts.
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