12. Week 10 About Greenhouse Gases

13. Greenhouse gases are gases in an atmosphere that *absorb and emit radiation within the *thermal infrared range. atmosphere – gaseous mass surrounding Earth’s surface absorb – to take in 흡수하다 emit – to send out radiation- electromagnetic waves thermal infrared range 열 적외선 About Greenhouse About Greenhouse Gases Gases

14. This process is the fundamental cause of the greenhouse effect. The main greenhouse gases in the Earth’s atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone. fundamental – necessary part of the system vapor – mist carbon dioxide – gas formed when someone breathes methane – gas that is used as fuel nitrous oxide – colorless, sweet smelling gas About Greenhouse About Greenhouse Gases Gases

15. In our solar system, the atmospheres of Venus, Mars and Titan also contain gases (that cause greenhouse effects). Greenhouse gases greatly affect the temperature of the Earth. Without them, Earth’s surface would be on average about 33 colder than at present. Venus – second planet from the sun Mars – fourth planet from the sun aka “The Red Planet” Titan – satellite of the planet, Saturn surface – outer layer

16. Human activities (since the start of the industrial era around the year 1750) have increased the levels of greenhouse gases in the atmosphere, causing the global warming. (Source: Wikipedia) industrial era – period of time around the year 1750 when the use of machinery rose

17. Vocabulary atmosphere – gaseous mass surrounding Earth absorb – to take in 흡수하다 emit – sent out radiation- electromagnetic waves thermal infrared range 열 적외선 fundamental – necessary part of the system vapor – mist carbon dioxide – gas formed when someone breathes methane – gas that is used as fuel nitrous oxide – colorless, sweet smelling gas Venus – second planet from the sun Mars – fourth planet from the sun aka “The Red Planet” Titan – satellite of the planet, Saturn surface – outer layer industrial era – period of time around the year 1750 when the use of machinery rose.