16. In Figure 1-2, what is the distance from point B to point E? 17. In Figure 1-2, what is the contour interval of the map?

18. In Figure 1-2, what is the approximate difference in elevation between point and point D?

19. In Figure 1-2, what is the elevation of point D?

20. The sun's energy drives which of the Earth's processes?

21. Which of the following is powered by energy from Earth's interior?

22. How can a scientific hypothesis become a theory?

23. What is a preliminary untested explanation that tries to explain how or why things happen in the manner observed called?

24.What is a scientific idea that is well tested and widely accepted by the scientific community is called?

25. In scientific
inquiry, when competing hypotheses have been eliminated, a hypothesis may be elevated to the status of a scientific what?