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1. Pour water into the beaker, then, place the egg inside.
2. See if the egg sinks or floats.
3. Next pour salt into the beaker and wait for the salt to dissolve.
4. See if the egg sinks or floats.
Sorry if you were unable to hear the last part. I said that when salt was added to the water, the density of the water increased. Sorry for the soft volume.
When the egg was placed in the pure water, it sunk.
However when salt was added to the water, the egg floated.
At first, the water had a lower density then the egg, so the egg sunk, However, when salt was added to the water, the density of the water increased as density=mass/volume and the saltwater had more mass than the water without salt before but the volume only slightly increased, making the density increase. Therefore, the egg floated as its density was less then the density of the saltwater and objects with lower density float while objects with higher density will sink.
After doing this experiment, my understanding of density has deepened. Now, I know that objects with lower density float while objects with higher density sink. I also learnt that whether objects float or sink is not related to the mass, instead, it is related to the density of the object. I also learnt how to calculate the density of an object.