What is the lowest layer of Earth’s atmosphere called?

Prepare for the Integrated Science and Technology (ISAT) Exam with our quiz. Use our flashcards and multiple choice questions to study effectively. Each question includes hints and detailed explanations. Get ready to ace your exam!

The lowest layer of Earth’s atmosphere is known as the troposphere. It extends from the Earth’s surface up to an average altitude of about 8 to 15 kilometers, depending on location and weather conditions. This layer contains approximately 75% of the atmosphere's mass and is where most of the weather phenomena occur, including clouds, rain, and winds.

The troposphere is characterized by a decrease in temperature with altitude, meaning that it gets colder the higher one goes. This cooling is significant because it influences weather patterns and climate. Additionally, the majority of the atmosphere's water vapor, which is crucial for precipitation and weather systems, is found within the troposphere.

In contrast, the other layers of the atmosphere, such as the stratosphere, mesosphere, and exosphere, are located above the troposphere and have different characteristics and functions. The stratosphere, for example, contains the ozone layer, which absorbs and scatters ultraviolet solar radiation, while the mesosphere and exosphere deal with phenomena like meteor burns and satellite orbits, respectively. Understanding the role of the troposphere helps in grasping essential concepts related to meteorology and atmospheric science.

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy