## Why does ice float in water? – george zaidan and charles

Do you ever wonder why your ice cubes float instead of falling to the bottom of your glass of water when you put them in? Giant icebergs float atop oceans and lakes, and this isn’t limited to mere ice blocks. Let’s check in with Science ABC to see why the frozen (i.e. solid) form of water still floats on the liquid form.
Whether or not an object can sink or float is determined by its mass. It can float if an object or material is less dense (lighter in weight) than the other components in a mixture. When an object floats, it displaces the same amount of fluid that it weighs. To illustrate this idea, Science ABC uses a bucket of water and some rocks: Tossing rocks into a bucket of water can cause them to sink. The water is displaced – or forced out of the way – by the rocks, which are denser than the water.
Since solid objects are denser and heavier than liquids, and ice is a solid, one would expect ice to sink in water. However, this is not the case! What exactly is it about ice that makes it float? Ice, believe it or not, has a lower density than water by around 9%. Since the water is heavier than the ice, it displaces it, allowing the ice to float to the surface.

## E*d films ever wonder why ice floats on water?

The fact that ice floats on water is common knowledge. It doesn’t matter how big the ice is; it won’t sink. And icebergs, which are massive icebergs, continue to float in the sea. Do you have any idea why ice floats in water?
Archimedes, a Greek scientist, founded the law of body floatation. When a body is immersed in water, two forces act on it: the weight of the body acting downwards and the buoyant force of the water acting upwards, according to this rule. The body floats on water if its weight is equal to or less than the up-thrust of the water. In other words, it can float on water if its weight is equal to or less than the weight of the water it is displacing. The body, on the other hand, can fall in water if its weight is greater than the weight of the water displaced. As a result, when a body’s weight is equal to the weight of the water displaced, it floats. Since its weight is less than the weight of the water it is displacing, a piece of wood floats on water. Half of the wood is under water, and the other half is above it, due to the weight of wood being almost half that of an equivalent volume of water. Similarly, cork’s weight is almost one-fifth that of the water it displaces, so about one-fifth of the cork is submerged while the remainder stays above water. On the basis of this rule, you can also understand how ice floats.

### Everwonder why ice floats on water?

The fact that water is made up of polar molecules is one of its most significant characteristics. Water molecules (H2O) have two hydrogen atoms and one oxygen atom that form polar covalent bonds. Although a water molecule has no net charge, its polarity produces a slightly positive charge on hydrogen and a slightly negative charge on oxygen, which leads to water’s attraction properties. The charges in water are caused by the fact that oxygen is more electronegative (or electron loving) than hydrogen. As a result, a mutual electron is more likely to be located near the oxygen nucleus than the hydrogen nucleus. The difference in electronegativities between the oxygen and hydrogen atoms produces partial negative charge near the oxygen and partial positive charge near both hydrogens since water is a nonlinear, or twisted, molecule.
Because of the opposite charges between water molecules, each water molecule attracts other water molecules, forming hydrogen bonds. Other polar molecules and ions, like certain biomolecules including carbohydrates, nucleic acids, and certain amino acids, attract or repel water. Hydrophilic refers to a polar material that readily interacts with or dissolves in water (hydro- = “water”; -philic = “loving”). Nonpolar molecules, such as oils and fats, on the other hand, do not interact well with water, as shown in. As seen in salad dressings containing oil and vinegar, these molecules detach from it rather than dissolve in it (an acidic water solution). Hydrophobic compounds are nonpolar compounds that are afraid of water (hydro- = “water”; -phobic = “fearing”).

### Neil degrasse tyson explains why ice floats

Why does ice float on top of the water instead of falling like the rest of solids? The response to this question is split into two sections. Let’s start with why something floats in the first place. Then consider that ice floats on the surface of liquid water rather than falling to the bottom.
If a material is less dense or has less mass per unit volume than the other components in a mixture, it can float. For example, if you throw a handful of rocks into a bucket of water, the rocks would sink because they are denser than the water. The water can float because it is less solid than the rocks. Essentially, the rocks displace or drive the water out of the way. To be able to float, an object must be able to displace a weight of fluid equal to its own weight.
At 4°C (40°F), water reaches its maximum density. It actually becomes less dense as it cools and freezes into ice. Most compounds, on the other hand, are denser in their solid (frozen) state than in their liquid state. Because of hydrogen bonding, water is special.