Jack's Science Experiment

Why is it easy to float in salt water and not in fresh?

I think you can float in salt water because the salt is pushing you up and you are trying trying to float as well.

Experiment:

First I put a potato in a bucket of cold water and it sank then I put a bag of salt in and it floated.

Conclusion:

The real reason is that there 's more salt in the water so it's pushing you up. A small amount of salt will dissolve and then the potato will still sink.  Once the water can not soak up any more salt the potato will float.