2. Warm Up September 19 th, 2013 Write a theory that explains each element of the picture. (How the layers formed, where D came from etc.) (30 word min.)

3. SUMMARY SUMMARIES

4. GRAPHING SUCCESS (EXAMPLE)

6. PRE-ASSESSMENT: EARTH HISTORY PT 2

7. IN ORDER FOR SCIENTISTS TO POSE ANY THEORY ON HOW WE GOT HERE, SCIENTISTS ASSUME ONE THING.

8. FOR SCIENTISTS TO POSE THEORIES ON HOW WE GOT HERE, THEY MUST ASSUME ONE THING. It may seem obvious to some; to others, a sliver of uncertainty.

9. The CONCEPT of UNIFORMITARIANISM. William Whewell in 1832 William Whewell FRS FGS, was an English polymath, scientist, Anglican priest, philosopher, theologian, and historian of science. He was Master of Trinity College, Cambridge.

10. The CONCEPT of UNIFORMITARIANISM. James Hutton in 1785 a Scottish farmer and naturalist, is known as the founder of modern geology.

11. The CONCEPT of UNIFORMITARIANISM. James Hutton in 1785William Whewell in 1832

12. UNIFORMITARIANISM* All forces have acted the same from the origin of the Earth to the present.

13. So, we assume… Gravity has always existed.

14. So, we assume… Gravity has always existed. Elements and molecules have had the same properties for as long as our universe.

15. So, we assume… Gravity has always existed. Elements and molecules have had the same properties for as long as our universe. (density, conductivity) Classic physics laws apply.

16. So, we assume… Gravity has always existed. Elements and molecules have had the same properties for as long as our universe. (density, conductivity) Classic physics laws apply. (thermodynamic laws, math laws, momentum, acceleration, motion…) However atoms work today, they’ve worked that way always.

17. So, we assume… Gravity has always existed. Elements and molecules have had the same properties for as long as our universe. (density, conductivity) Classic physics laws apply. (thermodynamic laws, geometric laws, momentum, acceleration) However atoms work today, they’ve worked that way always. (isotope degradation, speed of electrons)

18. Law of Superposition* - Sedimentary layers are deposited in a time sequence, with the oldest on the bottom and the youngest on the top.

19. Law of Superposition -

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24. BRAIN POP: ROCKS