520 510 km Exosphere 500 km 490 km 170 KP Themosphere 150 km 540 km 1:30 KP 120 km 190 kim 100 90 km 80 kim 70 kim Mesosphere 60 km 50 km 40 kim Stratosphere Troposphere 500/1500 Figure 1. What are the layers of the Atmosphere? The layers of the atmosphere are Troposphere, Stratosphere, Mesosphere, Thermosphere and Exosphere. Troposphere. The troposphere is the lowest layer of the atmosphere. It is the layer closest to the Earth's surface. The air we breathe is part of the troposphere. It also