Blue light is scattered in all directions by the tiny molecules of air in Earth’s atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. All this scattering mixes the colors together again so we see more white and less blue.

Earth’s atmosphere acts similarly, but these individual colors hit the atoms in the air and get scattered or reflected. The colors that have higher energies and are more excited get scattered more. Blue is higher energy, and so our sky looks blue since it’s scattered more.

The Short Answer: Gases and particles in Earth’s atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter, smaller waves.

The water molecules absorb all the red wavelengths from the light, making it reflect blue. This is also why shallower waters appear ‘less’ or lighter blue than deeper ones- less absorption means less reflection.

The water is in fact not colorless; even pure water is not colorless, but has a slight blue tint to it, best seen when looking through a long column of water. The blueness in water is not caused by the scattering of light, which is responsible for the sky being blue.

Water has no color but because of sunlight, the seawater appears blue to our eyes. The sea absorbs the violet, indigo, green, yellow, orange and red colors present in the sun’s rays, but because of the small wavelength of blue color, the color of seawater changes making it appear blue.

Our perception of flavor is based on aroma, and the five basic tastes: sweet, salty, bitter, sour and savory. Pure water does not contain compounds that elicit any of these tastes, and has a neutral scent, so we deem it “tasteless.”

Pure water is practically colorless, odorless, and tasteless. But it’s not at all simple and plain and it is vital for all life on Earth.

In the United States, the EPA defines “pure” water as water free from all types of bacteria and viruses. Water is a compound made up of hydrogen and oxygen, so pure water would be water that contains nothing but hydrogen and oxygen.

Yes, you can drink distilled water. However, you might not like the taste because it’s flatter and less flavorful than tap and bottled waters. Companies produce distilled water by boiling water and then condensing the collected steam back into a liquid. This process removes impurities and minerals from the water.

Pure water is neither acidic or basic; it is neutral.

Well actually, pure water is an excellent insulator and does not conduct electricity.

Water is an excellent conductor of electricity. You can become electricity’s path to the ground if you are touching water that touches electricity. Electricity would travel through the water and through you to the ground.

Gold is used as a contact metal in the electronics industry as it is a good conductor of both electricity and heat.

Materials that do not let current flow easily are called insulators. Most nonmetal materials such as plastic, wood and rubber are insulators.

The 5 common Thermal Insulation materials

• Mineral Wool. Mineral wool covers quite a few types of insulation.
• Fibreglass. Fibreglass is an extremely popular insulation material.
• Polystyrene.
• Cellulose.
• Polyurethane Foam.

When (ordinary) electrical potentials are applied at the opposite ends of such rubber, the electrons of the valence band are hardly elevated into the conduction band and hence no flow of electrical charge is possible across the rubber matrix. That is how rubber acts as an electrical insulator.

Vacuum insulated panels have the highest R-value, approximately R-45 (in U.S. units) per inch; aerogel has the next highest R-value (about R-10 to R-30 per inch), followed by polyurethane (PUR) and phenolic foam insulations with R-7 per inch.

Air in general is a good thermal insulator, but it can transmit heat through convection. However, if the air pockets inside the insulating material are separated from each other, heat flow from one air pocket to another cannot happen easily.

Trapped air is a natural insulator and because it is trapped, convection currents cannot be set up easily. So, trapped air reduces heat loss by conduction and convection. Many insulating materials incorporate trapped air.

Wood exhibits a low thermal conductivity (high heat-insulating capacity) compared with materials such as metals, marble, glass, and concrete. Thermal conductivity is highest in the axial direction and increases with density and moisture content; thus, light, dry woods are better insulators.

Conductors allow energy to flow through them – metals are examples of good conductors. Insulators stop the flow of energy through them –substances like plastics, glass and air are good insulators.

The nanowood insulated better in both cases. The wood blocked at least 10 degrees more heat than styrofoam or silica aerogel, which had been awarded the Guinness World Record for ‘best insulator’.

Glass isn’t as good a conductor of heat as metal, but it’s great insulator, making it retain heat well. Because of this glass performs a lot like dark metal — foods absorb more heat and bake faster, making glass a good choice for pies and some breads.