What is the closest layer of the atmosphere?

What is the closest layer of the atmosphere?

the troposphere
The atmosphere is divided into five different layers, based on temperature. The layer closest to Earth’s surface is the troposphere, reaching from about seven and 15 kilometers (five to 10 miles) from the surface. The troposphere is thickest at the equator, and much thinner at the North and South Poles.

What are the two layers closest to Earth?

Let’s look at each, from closest to farthest from the Earth.

• Troposphere. The layer of the atmosphere closest to the Earth is the troposphere.
• Stratosphere. Above the troposphere is the stratosphere, which extends to about 31 miles (50 km) above the Earth’s surface.
• Mesosphere.
• Exosphere.
• Pauses.

What is the 2 layer of the atmosphere?

Most of the important processes of the atmosphere take place in the lowest two layers: the troposphere and the stratosphere.

What are the two most important layers in the atmosphere?

Earth’s atmosphere has five major and several secondary layers. From lowest to highest, the major layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere. Troposphere.

What are the different layers of the atmosphere?

Layers of the atmosphere The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about 500 km above the Earth’s surface is called the exosphere.

How is the structure of the atmosphere related to temperature?

Structure of the Atmosphere Unlike the changes in pressure and density, which decreases with altitude, the changes in temperature are irregular. A change in temperature with distance is called a temperature gradient. The Earth’s atmosphere is divided into layers based on the layer’s temperature gradient.

What makes up most of the air in the troposphere?

The troposphere contains about 75% of all of the air in the atmosphere, and almost all of the water vapour (which forms clouds and rain). The decrease in temperature with height is a result of the decreasing pressure. If a parcel of air moves upwards it expands (because of the lower pressure).

Is the exosphere part of the Earth’s atmosphere?

Exosphere is the final frontier of the Earth’s gaseous envelope. There is no clear cut distinction between the Earth’s atmosphere layers and outer space. The air in the exosphere is constantly but gradually leaking out of the Earth’s atmosphere into outer space.