"Science for Kids: Earth's Atmosphere." Ducksters. Jan. 2013. Web. 30 Jan. 2013. <http://www.ducksters.com/science/atmosphere.php>.
"Stratosphere." Definitions.net. STANDS4 LLC, 2013. Web. 17 Apr. 2013. <http://www.definitions.net/definition/stratosphere>.
“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>.
What is the stratosphere?
The second layer of our atmosphere is called the stratosphere. The stratosphere is crucial to life on Earth because it contains a gas called ozone. Ozone absorbs the ultraviolet (UV) light that comes from the sun and changes it into heat. This prevents the radiation from reaching the surface of the Earth in quantities that could adversely affect the lives of human beings, plants, and animals. Weather balloons fly into the stratosphere to gather essential data needed to forecast the weather. Some military and spy aircraft fly in this layer, and some commercial airliners too.