MCQ Detailed View

The thermosphere is one of the upper layers of Earth's atmosphere. It starts roughly at an altitude of about 85 kilometers above the Earth’s surface and extends upward to the base of the exosphere at approximately 690 kilometers.

The atmosphere is divided into several layers based on temperature changes and composition. Starting from the Earth's surface, the main layers are the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. The thermosphere lies above the mesosphere and below the exosphere.

In the thermosphere, temperatures increase significantly with altitude due to absorption of high-energy solar radiation. This layer is important because it contains the ionosphere, a region filled with charged particles that reflect and modify radio waves, enabling long-distance communication.

The exosphere, which lies above the thermosphere, is the outermost layer where atmospheric particles gradually fade into outer space.

Knowing the altitude range of the thermosphere is important for understanding satellite orbits, radio communications, and atmospheric science. This knowledge is part of the broader physics topic of Earth's atmosphere and space environment.

This explanation helps students grasp how atmospheric layers are structured and why each layer has distinct characteristics.