What is the basis for dividing the atmosphere into four?

What is the basis for dividing the atmosphere into four?

Background Information: The atmosphere can be divided into four layers based on temperature differences. The layer closest to the Earth is called the troposphere. Above this layer is the stratosphere, followed by the mesosphere, then the thermosphere.

What are the two divisions of the atmosphere?

Based on chemical composition, the atmosphere is divided into two broad layers: the homosphere and the heterosphere. The homosphere extends up to the height of 56 mi.

What is the main basis for the four vertical layers of the atmosphere?

Our planet’s unique atmosphere contains four distinct layers. These layers are divided vertically on the basis of temperature. The different layers alternate between regions of increasing temperature and decreasing temperature with height.

What is the most abundant element in the Earth’s atmosphere?

Nitrogen
The most abundant naturally occurring gas is Nitrogen (N2), which makes up about 78% of air. Oxygen (O2) is the second most abundant gas at about 21%. The inert gas Argon (Ar) is the third most abundant gas at . 93%.

What is the primary function of Earth’s atmosphere?

The atmosphere of Earth protects life on Earth by creating pressure allowing for liquid water to exist on the Earth’s surface, absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night (the diurnal temperature variation …

Why is the earth divided into four layers?

The Earth’s atmosphere is made up of gases. It is less dense than the Earth’s crust, which is a solid. This is why the Earth’s surface and atmosphere form distinct layers.

What is the order of layers in the atmosphere starting from the?

Starting from earth’s surface, the six layers are Troposphere, Stratosphere, Mesosphere, Thermosphere, Ionosphere and Exosphere.

What is the rarest element in the universe?

Astatine
Astatine is the rarest naturally occurring element.

Why are these two elements the most common in the earth’s atmosphere?

Since the oceans are mostly water, the elements hydrogen and oxygen are the most common. Sodium and chlorine are found in the salt in ocean water. Earth’s atmosphere is made up of a combination of gases, including nitrogen, oxygen, and carbon dioxide. They make up almost 99% of the atmosphere by mass.

What are the two main functions of the atmosphere?

The atmosphere has some very important functions:

• It has the oxygen that we need to breathe.
• The atmosphere filters the Sun’s rays. If there were no atmosphere, the Sun would burn us more.

What is the basis for dividing the atmosphere into four layers?

What Is the Basis for Dividing… What Is the Basis for Dividing the Atmosphere Into Four Layers? The atmosphere is divided into four layers because each layer has a distinctive temperature gradient. The four layers of the atmosphere are the troposphere, the stratosphere, the mesosphere and the thermosphere.

How tall are the layers of the atmosphere?

Earth’s Atmospheric Layers. Diagram of the layers within Earth’s atmosphere. The troposphere starts at the Earth’s surface and extends 8 to 14.5 kilometers high (5 to 9 miles).

Which is the most breathable layer of the atmosphere?

The troposphere is the layer of the atmosphere in which people live, with breathable air and generally comfortable temperatures, due to the reflection of the sun’s heat off the earth. This layer, which is where weather occurs, begins at the earth’s surface and extends out about 4 miles…

What makes up the majority of the air in the atmosphere?

By mole fraction (i.e., by number of molecules), dry air contains 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.