Water in a bottle freezes from the sides, not from the top. When water freezes, it expands and increases in volume. The surface area of the liquid part of the water becomes less as it freezes. When liquid water freezes in a bottle, it forms crystals on the sides of the bottle.
Why doesn't water freeze in a glass bottle?
The answer is that the top of the liquid part of your glass bottle isn't as cold as its sides, so it can't become frozen. Water freezes from the edges inward, so if you put an ice cube in your glass and then pour warm water into it, you'll see that the ice cube melts first on its outer edge. This is because this part of the cube was exposed to more heat than some other parts were; only after all sides have been warmed up enough do they begin to melt (or "phase change").
This process happens when freezing things too: when something changes phase from solid to liquid or vice versa, there's always heat involved—either being released or absorbed by particles inside those materials. In order for an object like a metal bucket full of water at room temperature (around 20°C) to turn into ice without any outside help needed—like an electric heater inside our house turning on suddenly--its temperature would need to get colder still before all those molecules locked together could break apart again under their own weight alone; otherwise we'd end up with less mass overall than what was originally there due outwards pressure forces pushing back against those bonds!
So when the water inside a glass bottle freezes, its volume increases by 9%. This means that your ice cubes can grow as big as they want without cracking the glass!
When water freezes, it expands in volume and size.
As the freezing process begins, the surface area of the liquid part of the water decreases because more of it freezes into ice.
The water expands in all directions as it turns into ice, which means that its volume increases.
These crystals are formed by water molecules aligning themselves in regular patterns.
The freezing process begins when these molecules form ice crystals that grow outward from their center and downward toward the bottom of the container 1. When they reach a certain size, they fall off as new ones are created at their center 2. As more and more ice accumulates at the bottom of your water bottle (or any other container), it creates an upward pressure on all this newly frozen material 3 — which makes sense, since you don't want to have to hold up all that extra weight!
When you put your frozen water bottle into warm air again, it melts slowly because there's no way for heat energy from outside sources like sunlight or friction against other surfaces (like when shaking) get inside fast enough before some of those newly-formed crystals fall off again 4. That leaves behind even less liquid than before until eventually all that's left are just tiny dots floating around inside--and we call those dots "snowflakes"!
The answer is simple: water freezes from the sides, not the top (or bottom). The reason for this is that freezing occurs because of the surface area. Water expands when it freezes, which means that as it gets colder and more frozen, its volume increases.
As it expands outward due to freezing, there's less room inside your bottle for liquid water. So instead of expanding upward or downward to fill out all available space in your glass bottle as a whole, ice forms on its outer edges. That way they're able to take up a disproportionate amount of room compared with their volume compared with liquid water inside your container—and this causes freezing from the sides rather than from above or below.
Water in a glass bottle freezes from the sides, not from the top. This is because water expands as it freezes, causing crystals to form on the sides of the bottle instead of at its top.