Question

Discuss the origin and composits of atmosphere? 220 words

Answer 1

Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and 0.93% argon. The remainder, less than 0.1%, contains many small but important trace gases, including water vapor, carbon dioxide, and ozone. All of these trace gases have important effects on the earth's climate. The atmosphere can be divided into vertical layers determined by the way temperature changes with height. The layer closest to the surface is the troposphere, which contains over 80% of the atmospheric mass and nearly all the water vapor. The next layer, the stratosphere, contains most of the atmosphere's ozone, which absorbs high energy radiation from the sun and makes life on the surface possible. Above the stratosphere are the mesosphere and thermosphere. These two layers include regions of charged atoms and molecules, or ions. Called the ionosphere, this region is important to radio communications, since radio waves can bounce off the layer and travel great distances. It is thought that the present atmosphere developed from gases ejected by volcanoes. Oxygen, upon which all animal life depends, probably built up as excess emissions from plants that produce it as a waste product during photosynthesis. Human activities may be affecting the levels of some important atmospheric components, particularly carbon dioxide and ozone.

Answer 2

Hey friend

Composition of the atmosphere

Major gases

The most common atmospheric gas, nitrogen (chemical symbol N2) is largely inert, meaning that it does not readily react with other substances to form new chemical compounds. The next most common gas, oxygen (O2), is required for the respiration (breathing) of all animal life on Earth, from humans to bacteria. In contrast to nitrogen, oxygen is extremely reactive. It participates in oxidation, examples of which include apples turning from white to brown after being sliced, the rusting of iron, and the very rapid oxidation reaction known as fire. Just under 1% of the atmosphere is made up of argon (Ar), which is an inert noble gas, meaning that it does not take part in any chemical reactions under normal circumstances. Together, these three gases account for 99.96% of the atmosphere. The remaining 0.04% contains a wide variety of trace gases, several of which are crucial to life on Earth.

if any atmosphere was present after Earth was formed about 4.5 billion years ago, it was probably much different than that of today. Most likely it resembled those of the outer planets—Jupiter, Saturn, Uranus, and Neptune—with an abundance of hydrogen, methane, and ammonia gases. The present atmosphere did not form until after this primary atmosphere was lost. One theory holds that the primary atmosphere was blasted from Earth by the Sun. If the Sun is like other stars of its type, it may have gone through a phase where it violently ejected material outward toward the planets. All of the inner planets.

pl make me brainlist