What is the second layer in the atmosphere?

What is the second layer in the atmosphere?

• A. Ionosphere
• B. Stratosphere
• C. Troposphere
• D. Exosphere

Answer: (A)

This question tests the order of Earth’s atmospheric layers. The layer directly above the surface is the troposphere, where weather occurs. The next layer up is the stratosphere, which contains the ozone layer and shows a temperature increase with altitude due to ozone absorbing ultraviolet light. This temperature structure makes it distinct from the layer below. The ionosphere isn’t one of the basic vertical layers like troposphere or stratosphere; it’s a region in the upper atmosphere where ions are abundant, spanning parts of the mesosphere, thermosphere, and exosphere, and it’s more about electrical properties than a simple height-based layer. Therefore, the second layer from the surface is the stratosphere.

This question tests the order of Earth’s atmospheric layers. The layer directly above the surface is the troposphere, where weather occurs. The next layer up is the stratosphere, which contains the ozone layer and shows a temperature increase with altitude due to ozone absorbing ultraviolet light. This temperature structure makes it distinct from the layer below. The ionosphere isn’t one of the basic vertical layers like troposphere or stratosphere; it’s a region in the upper atmosphere where ions are abundant, spanning parts of the mesosphere, thermosphere, and exosphere, and it’s more about electrical properties than a simple height-based layer. Therefore, the second layer from the surface is the stratosphere.