Why Does This Happen?
Each liquid has a different density, meaning that although the volume is the same, the mass of each liquid is different. Density = Mass / Volume.
The higher the density, the more compact the substance is, e.g. Iron is more dense than water.
- The corn syrup is much denser than water, so the water floats above it.
- The water is more than the oil but less dense than the corn syrup, so it floats in between the oil and corn syrup.
- Finally, the shaving is the least dense of all the materials... so it sits above the three liquids.
Corn Syrup = 1.37g/ml
Water = 1.00g/ml
Oil = 0.91g/ml
Shaving cream = approximately 0.80g/ml
Questions to ask students:
- Is the vegetable oil more or less dense than the water?
- Why do some objects sink and others float?
The planet Saturn is less dense than water. A big enough ocean could make it float!
Solid water (ice) floats because it is less dense than water as a liquid. Very unusual for a chemical.
Check out the different types of icebergs found in the world:
Canadian Geographic Magazine
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