Q:

What are the components of air?

A:

While the composition of dry air differs slightly from place to place, it is generally made up of about 78 percent nitrogen and 21 percent oxygen. Argon makes up most of the remaining 1 percent, and carbon dioxide and other trace elements make up the rest.

If air is not completely dry, water vapor may be up to 5 percent of its composition. The presence of water does not change the relative proportions of other gases.

Different layers of the atmosphere contain differing air compositions. For example, water vapor is mostly contained in the lowest layers of air, while about 90 percent of the Earth's ozone is contained within the stratosphere. The very light elements helium and hydrogen are mostly found in the outer layer, the exosphere.


Is this answer helpful?

Similar Questions

  • Q:

    What are the properties of air?

    A:

    Air is matter that has weight and contains 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of argon, carbon dioxide and other ingredients.

    Full Answer >
    Filed Under:
  • Q:

    What are the components of water?

    A:

    Water is comprised of two parts hydrogen and one part oxygen, giving it the chemical formula H2O. Water is the most common chemical compound found on planet Earth and the most vital compound for the formation and survival of life. Bodies of water have many foreign components within them because water is a solvent that erodes at rock formations.

    Full Answer >
    Filed Under:
  • Q:

    How many protons does carbon have?

    A:

    Carbon has six protons, which determines its place in the periodic table. All chemical elements possess an atomic number like this, starting with hydrogen at the atomic number of one. Carbon is the element widely accepted as being the key component for life on Earth.

    Full Answer >
    Filed Under:
  • Q:

    What is the tropomyosin molecule held in place by when at rest?

    A:

    At rest, tropomyosin is held in place by troponin molecules. Thin muscle filaments are composed of actin, tropomyosin and troponin. During a muscle contraction, myosin proteins in thick muscle filaments bind to the actin in thin filaments, explains Linda Costanzo. Tropomyosin blocks actin until a muscle contraction is to occur.

    Full Answer >
    Filed Under:

Explore