Is the atmosphere divided into different layers?
Like the three layers found inside the Earth (crust, mantle, and core), the atmosphere around the Earth also has layers: troposphere, stratosphere, mesosphere, thermosphere, and exosphere.
"Science for Kids: Earth's Atmosphere." Ducksters. Jan. 2013. Web. 30 Jan. 2013. <http://www.ducksters.com/science/atmosphere.php>.
“The Layers of Our Atmosphere.” Kids Geo.com. 2013. Web. 17 Feb 2013. <http://www.kidsgeo.com/geography-for-kids/0046-layers-of-the-atmosphere.php>.