Which characteristics are used to describe air? select three options.
altitude
density
mass
pressure
radiation

Density, Pressure and Mass.

Explanation:

Air is a fundamental element, being formed by a combination of gases, water vapor and suspended particles, it can be described using the terms density, pressure and mass. It is therefore a vital substance for the maintenance of life on earth, alongside water and soil.

In addition, air is essential for climate, rain distribution and seed dispersion which favor agricultural production. On the other hand, it favors the development of various diseases by viruses, bacteria and microorganisms, which are carried by drafts.

The main elements that make up air are essentially nitrogen (78%) and oxygen (21%) and in small amounts argon (0.94%), carbon dioxide (0.03%), neon (0.0015%). Although it has weight and takes up space in the atmosphere, note that air is a collection of substances that has no color, smell, taste and that we cannot see or touch.

the  frequency of a wave represents  the number of wavelengths that pass a specific point per second. the unit for  frequency  is hertz (hz).

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water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.