Bonus+Work


 * __Ratio of thickness of earth (radius) to thickness of atmosphere: __**

//6371 km: 300-400 km//


 * __Temperature of atmospheres: __**
 * **//Troposphere://** Solar radiation and heat emitted from Earth's surface affect the air, causing the air to move around continuously and making high temperatures. Pollutants like pollen grains also affect the air. The temperature drops about 6.5 C for every 1 km increase in altitude - as you move away from the earth, the temperature gets colder.
 * **//Stratosphere://** As you move higher, the temperature gets warmer. The stratosphere has dry air with few clouds. The ozone layer in the stratosphere absorbs much of the ultraviolet radiation from the sun, heating it up.
 * **//Mesosphere://** Temperatures can reach as low as -100 C. As the small pieces of dust and meteors collide with particles in the mesosphere, thermal energy is released and the space debris burns up. The mesosphere gets very cold as you move farther away because you are moving away from the ozone layer (heat).
 * **//Thermosphere://** At the top of the thermosphere, the solar radiation is the strongest therefore, temperatures can reach 1500 C to 3000 C. The oxygen absorbs the light from the sun, creating high temperatures.
 * **//Exosphere://** As you increase in altitude, the temperature decreases because there is no heat source close to it.