Part 1 The following diagram illustrates the differences in how solar energy interacts with the curved surface of the Earth Given that the cross sectional area of the Sun rays is the same 1 m x 1 m for both locations calculate the power or energy density hitting the Earth at A and B 1370x 1370 Location A 1370 x25 34 250 Location B Part 2 In the diagrams below label the following North Pole South Pole Equator Tropic of Cancer Tropic of Capricorn Arctic Circle Antarctic Circle Sub Solar Point Circle of Illumination indicate what half is illuminated DECEMBER 21 illumination scrdeofgrope Fre 6 Cie 50Tropice 23 o Equator 23 5 of Tropic Capricorn s Sobet Poste 8 66 5 Antarcte JUNE 21 Part 3 Na Ai 23 joTropicener SoFavao o e Capricorn 66 5Entree En Spole bSsolent A home owner is wondering whether she should install a geothermal heating and cooling system or whether a solar powered system is a better option To help her make a decision answer the following questions You can use Internet resources to find answers What is the energy density of incoming solar radiation at the top of the atmosphere What is the incoming solar radiation averaged over an entire year Explain the difference between these two numbers How does this compare with the geothermal heat flux List some of the disadvantages of geothermal heating 380 in minium 430 is maximum List some of the disadvantages of using solar energy for heating purposes outward to inward heat flow greenhouse gas emissions land requirements 450 w 340 w m2 takes up lots of space costs a lot no power at night