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carol822
carol822 asks:
Q:

What makes an egg float?

can ayone tell me what makes an egg float besides salt.
In Topics: Helping my child with science
> 60 days ago

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rkaiulani
rkaiulani writes:
Hi Carol,
I'm pretty sure that it has to do with density, and which thing (water, salt water, egg) is more dense. Check out this activity, which explains this very principle:

http://www.education.com/magazine/article/Float_This/
> 60 days ago

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fritzr
fritzr writes:
An egg will sink in normal tap water.  This is because eggs have a higher density than tap water. Density is the ratio of the amount of matter in an object compared to its volume.  That is to say that a small, heavy object, such as a rock or a lump of lead, is denser than a larger object of the same mass, such as a piece of cork or foam. Essentially it means an egg weighs more than an egg-sized amount of tap water. In the same way, a nail is heavier than a wooden stick of the same size because steel is denser than wood.

Salt water is denser than an egg. The egg weighs less than an egg-sized amount of of saltwater.  Because of this, an egg is similar to a helium balloon in the air.  The balloon’s density is less than the surrounding air and therefore it floats.  Likewise an egg floats in saltwater.
> 60 days ago

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DavidAltair
DavidAltair writes:
Besides salt in the H2O, what will make an egg float is the amount of air in the egg.  You see, the egg shell is not as solid as one might think.  It is actually full of tiny pores, which will let air in and liquid out.  If the egg is older, it will contain a larger pocket of air inside, as more air and possibly other gases have made their way into the egg through the pores of the shell.  If there is enough air inside the shell, the egg will float due to the added buoyancy the air provides.

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manderson7m
manderson7m writes:
An egg will float if it is bad or rotten.
> 60 days ago

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