1001 Space Earth Earth Rocks and Minerals Landscape Sea Weather and Climate Natural Disasters Resources Nature History Human World Science and Technology

Choose a Page:*What is the troposphere?*Why do we have seasons?What is happening to the ozone layer?Where does rain come from?What is convection?Where do hot and cold winds blow?What is the 'greenhouse' effect?What is a weather front?What happens when air is heated?What is air pressure?What are clouds?What are the prevailing winds? What is the troposphere? The Earth's atmosphere The troposphere is the lowermost layer of the atmosphere. This is the layer in which all life exists, and where all the weather processes occur. Its upper limit varies from place to place, but it usually extends to about 6 miles (10 km) above the Earth's surface.   Previous: Back Book: 1001 Section: Earth Chapter: Weather and Climate