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1、,Whats the humour?,Introduction to Earth Sciences: Earths Four Spheres,On your whiteboards use a drawing/illustration that indicates what you think the four spheres are. HINT: the four spheres include all aspects of the earth as a planet.,The four spheres:,1.) Atmosphere 2.) Geosphere 3.) Hydrospher
2、e 4.) Biosphere,#1 Atmosphere,Gaseous envelope surrounding the earth Earth is only planet with free oxygen,Layers of the Atmosphere,Troposphere,The temp decreases with altitude layer where our weather occurs The air composition is 78% Nitrogen, 21% Oxygen,Stratosphere,Separated by the tropopause The
3、 temp increases slightly with altitude Ozone layer,Mesosphere,Meso or middle layer Coldest of all layers Most meteors burn up here,Thermosphere,The heat sphere Extreme temperatures Outer portion transitions into outer space,#2 Geosphere,The earth and its physical features and landscapes What happens
4、 on or below the earths surface,#3 Hydrosphere,All water at or near the surface of the earth Water is constantly recycled (groundwater, glaciers, oceans, freshwater etc),#4 Biosphere,All living things supported on earth,How do processes affect our four spheres?,Example: Volcano How does a volcano af
5、fect each sphere?,Atmosphere Geosphere Hydrosphere Biosphere,Event Volcano,Group Activity,Each group will complete the following for your assigned event Group 1 hurricane Group 2 deforestation Group 3 large scale mining project (i.e. oilsands) Group 4 asteroid hitting earth Group 5 factories emitting Carbon Dioxide,Atmosphere Geosphere Hydrosphere Biosphere,
