Answer:
Solid and liquid
Step-by-step explanation:
In solid state, the particles are tightly packed together hence forming a regular shape.
In liquid state, the particles are tightly packed together with some degree of movement.
In gaseous state, the particles are loosely packed and free to move randomly.
Since the particles of both solid and liquid state are tightly packed together, their corresponding density will only show a slight difference and hence almost similar.