Multiple choice

How many MAIN layers does Earth's atmosphere have? (hint:one layer is broken up into two parts)

  1. 6

  2. 7

  3. 4

  4. 5

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

Earth's atmosphere is traditionally divided into 4 main layers based on temperature trends: the troposphere, stratosphere, mesosphere, and thermosphere. The thermosphere is often considered to include the ionosphere and exosphere as sub-layers.