1. How Science Changes Leslie Prohaska Florida State University SCE5943 Field Lab Internship Dr. Alejandro Gallard October 19, 2009

2. The story of Pangea Remember how the theory of plate tectonics developed Alfred Wegener proposed his idea of continental drift in his 1915 book, The Origin of Continents and Oceans His evidence included fossils of the same lizard and same plant being found on the eastern side of South America and western side of Africa This was not enough though…

3. More evidence needed When technology improved after World War II, scientists were able to map the floor of the ocean Magnetic stripes were found on the sea floor which proved that the sea floor was spreading The theory of plate tectonics was finally accepted in the 1960’s because of this evidence

5. As technology improves, there are new ways to experiment and to make these observations

6. If this new information does not fit with the old explanations or, then scientists will make new theories to explain their findings

8. Progress in science consists of the development of better explanations for the causes of natural phenomena. (Teaching about Evolution and the Nature of Science, 1998, p.42)

11. Dalton, 1808, all matter is made of atoms

12. JJ Thomson, 1897, plum pudding model

13. Rutherford, 1909, gold foil experiment, most of the atom is open, empty space

14. Bohr, 1913, orbits and energy levels

16. Matthias Schleiden –1837, all plants are composed of cells

17. Theodore Schwann – 1839, all animals are composed of cells

19. Carolus Linnaeus – 1753, kept two kingdoms but broke them into smaller groups and had everyone use Latin

20. Five kingdom system, 1959, Animal, Plant, Fungi, Protists, Moneran, Whittaker