Multiple choice

Which of the following is the correct order of layers of atmosphere with respect to increase in distance from the earth?

  1. Troposhere – Stratosphere – Mesosphere – Exosphere – Thermosphere

  2. Troposhere – Stratosphere – Thermosphere – Exosphere – Mesosphere

  3. Troposhere – Stratosphere – Mesosphere – Thermosphere – Exosphere

  4. Troposhere – Stratosphere – Exosphere– Mesosphere – Thermosphere

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Troposphere: The layer of the atmosphere closest to the earth is the troposphere. It begins at the surface of the earth and extends to about 4-12 miles. The temperature of the troposphere decreases with height. This layer is known as the lower atmosphere. Stratosphere: Above the troposphere is the stratosphere, which extends to about 30-35 miles above the earth's surface. Temperature rises within the stratosphere, but still remains well below freezing. Mesosphere: From about 35 to 50 miles above the surface of the earth, lies the mesosphere, where the air is especially thin and molecules are great distances apart. Temperatures in the mesosphere reach a low of -184°F (-120°C). The stratosphere and the mesosphere are the middle atmosphere. Thermosphere: The thermosphere rises several hundred miles above the earth's surface, from 50 miles up to about 400 miles. Temperature increases with height and can rise to as high as 3,600°F (2000°C). Nonetheless, the air would be cold because the hot molecules are so far apart. This layer is known as the upper atmosphere. Exosphere: Extending from the top of the thermosphere to 6200 miles (10,000 km) above the earth is the exosphere. This layer has very few atmospheric molecules, which can escape into space.