Unit 2 Geography

How many miles from the Sun is Earth? 75 million 88 million 93 million 850,000 Which is NOT a subsystem of Earth? stratosphere atmosphere hydrosphere lithosphere What percentage of our atmosphere is nitrogen? 56% 12% 21% 78% How thick in the Earth's mantle? 1800 miles 2300 miles 75 miles 985,000 miles Of the Earth's water, what percentage is freshwater? 70% 14% 3% 10% Which is NOT a factor of climate? Distance from the ocean Vegetation Elevation Latitude The first day of summer and the first day of winter are called _. equinoxes solstices subversions holidays