Final answer:
The unit that is approximately equal to the volume of one gram of water at room temperature is the cubic centimeter (cm³).
Step-by-step explanation:
The unit that is approximately equal to the volume of one gram of water at room temperature is the cubic centimeter (cm³).
The metric system was designed so that water would have a density of 1 gram per cubic centimeter, or 1 g/cm³. This means that the volume of one gram of water is equal to one cubic centimeter.
For example, if you have a small container with one gram of water in it, the volume of the water would occupy one cubic centimeter of space.