Which big idea guiding Earth science relates most directly to the four spheres of Earth?
Earth's history
Earth in the solar system
the structure of the Earth system
constructive and destructive forces that shape Earth

If we review the changes in the landscape surrounding the great salt lake in utah we can see a change in topography. look at the area to the south of the lake. what change has occurred during the last twenty-nine years? a) erosion of the hills b) an increase in marshland c) flooding of the area and the development of wetlands d) deposition of sediments and an increase in elevation