What are the characteristics of the main layers of the atmosphere?
Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases. These gases are found in layers (troposphere, stratosphere, mesosphere, thermosphere, and exosphere) defined by unique features such as temperature and pressure.
What are the two main layers 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.
How were the layers of the atmosphere determined?
The atmosphere has five different layers that are determined by the changes in temperature that happen with increasing altitude. Living at the surface of the Earth, we are usually only aware of the events happening in the lowest layer, the troposphere, where all weather occurs.
Which of the following identifies the layers of the atmosphere in correct order?
Moving upward from ground level, these layers are called the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. The exosphere gradually fades away into the realm of interplanetary space. Layers of the atmosphere: troposphere, stratosphere, mesosphere and thermosphere.
Which layer of the atmosphere is the Aurora?
Aurora and satellites occur in this layer. The ionosphere is an abundant layer of electrons and ionized atoms and molecules that stretches from about 48 kilometers (30 miles) above the surface to the edge of space at about 965 km (600 mi), overlapping into the mesosphere and thermosphere.
Which layer of the atmosphere absorbs and scatters ultraviolet radiation?
The ozone layer, which absorbs and scatters the solar ultraviolet radiation, is in this layer. The mesosphere starts just above the stratosphere and extends to 85 kilometers (53 miles) high. Meteors burn up in this layer. The thermosphere starts just above the mesosphere and extends to 600 kilometers (372 miles) high.
Which part of the atmosphere is the most dense?
The troposphere starts at the Earth's surface and extends 8 to 14.5 kilometers high (5 to 9 miles). This part of the atmosphere is the most dense. Almost all weather is in this region. The stratosphere starts just above the troposphere and extends to 50 kilometers (31 miles) high.
