Question

Oil is ______________ than water. (less dense/more dense)

Answer 1

1. Oil is lighter than water. It floats over water because its density is lower than that of water.
2. Oil is less dense than water because the molecules that make up the oil are larger than those that make up water, so they cannot pack as tightly together as the water molecules can.
3. They take up more space per unit area and are less dense.

Hence, oil is less dense than water.