Final answer:
Materials that float in water include ethanol, ice, and corn oil because they have a lower density than water.
Step-by-step explanation:
According to the given table, the materials that float in water are:
These materials float because they have a lower density than water. Ice is less dense than water, which is why it floats. Similarly, corn oil and ethanol have a lower mass-to-volume ratio than water, allowing them to float as well.