Salt water has a greater density than fresh water. If an egg sinks to the bottom in a container of fresh water, what can you do to make the egg float? A. Remove some fresh water. B. Add some fresh water. C. Add salt to the fresh water. D. Soft-boil the egg.

The correct answer is C.

The egg sinks in freshwater because it is more dense than the water. So, to make the egg float, you would have to increase the density of the water. Since salt water has a greater density than freshwater, you would add salt to the freshwater, thus causing the egg to float rather than sink.