A plastic bottle filled with water was placed in the freezer. When all the water froze, it turned out that compared

A plastic bottle filled with water was placed in the freezer. When all the water froze, it turned out that compared to the water that was originally in the bottle, the ice has: A) a greater mass B) a smaller mass C) a greater density D) a lower density

Answer: D) ice has a lower density.

The mass in the bottle of water cannot change when it freezes, since nothing was poured from the bottle and nothing was added to it. Only the state of the substance (water) in the bottle has changed. This process is called “change of state of aggregation” or “phase transformation”. But the density will decrease, since the density of water in the solid state is lower than in the liquid state. This is due to the special structure of the ice crystal lattice.