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Please explain the questions

                     What assumptions do we

make about the formation of bodies in the solar system

.                     (a) How are the inner planets stratified

(b) What is the nature of the layers that make up the outer planets?

                   (b) How do we use Steno's Laws?

                    (a) What can thickness of beds tell us?

(b) How much time is represented by an inch preserved in the rock record?

                    How do we interpret cross-cutting beds?

                    (b) how does radiometric (absolute) age dating work?

(c) When do we use radiometric (absolute) age dating?

                     (c) How do we "reset the geologic clock"?

                     How does studying ancient magnetism aid us in our studies of plate tectonics?

                     What is the relationship between paleomagnetism and sea-floor spreading theory?

                 How are mid-ocean ridges and deep-sea trenches related to sea floor spreading?

               (a) What do magnetic stripe patterns tell us? 

(b) What are the patterns from ridge to trench?

                Where is new crust forming? At which type of boundary is crust being consumed?

.                 What happens to crust at a neutral boundary?

  How do Wilson Cycles relate to the breakup of Pangaea?

                When did the present geography (continents positions) come about? After which event?

 (b) Where might convection cells originate?

   What is the difference in approach between single cell and minicell theory?

  What does the surface of Venus tell us? 

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