Actually in general The water starts to freeze from the surface. The water that remains at the bottom is liquid.

This situation is somewhat knowledge of chemistry It needs. But don’t worry, we will explain it to you in the simplest way!

The density of water decreases when it freezes.

Let’s go back in time a little with you. Do you remember this topic we used to cover in chemistry classes? Decreasing density of waterIt is formed due to the hollow and regular crystal structures that it forms as it solidifies.

Water molecules are actually oxygen and with covalent bonds between hydrogen atoms are very closely linked. There are also weak hydrogen bonds between molecules. These bonds make water more flexible when it is in liquid form.

As the temperature decreases, the kinetic energy of water molecules also decreases.

But water, It behaves abnormally at temperatures below 4°C. As temperature drops, water molecules increase volume by forming empty structures instead of moving closer together. Water crystallizes and forms regular hexagonal structures. You can guess that gaps will appear between these structures.

This porous structure ensures that ice is formed when water freezes. This situation, When water reaches freezing point As it crystallizes, it leaves voids inside, resulting in a lower density.

This ensures that the water remains on the surface when it freezes.

In other words, water starts to freeze from the surface, When water reaches freezing point This happens thanks to the hollow and regular crystal structures that this creates. These structures ensure that the density of water decreases and remains on the surface when it freezes.

In this situation in water bodies such as lakescausing freezing to start from shallower areas and progress towards the center of the surface.

In short, because the density of ice is low While frozen water remains on the surface; The denser water is in the lower parts.

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