1. Earth Portrait of a Planet Chapter 23 Norton Media Library

2. Fig. 23.00 (c) DigitalVision/PictureQuest

3. Fig. 23.01 W. W. Norton

4. Fig. 23.02 W. W. Norton

5. Fig. 23.03 a NASA

6. Fig. 23.03 b NASA

7. Fig. 23.03 c NASA

8. Fig. 23.04 a, b W. W. Norton

9. Fig. 23.04 c W. W. Norton

10. Fig. 23.04 d W. W. Norton

11. Fig. 23.04 e W. W. Norton

12. Fig. 23.05 W. W. Norton

13. Fig. 23.06 W. W. Norton

14. Fig. 23.07 a W. W. Norton. After Van Andel, 1994

15. Fig. 23.07 b, c W. W. Norton. After Sloss, 1962

16. Fig. 23.07 d W. W. Norton. After Boggs, 1995

17. Fig. 23.07 e W. W. Norton. After Van Andel, 1994

18. pp.714-715 original artwork by Gary Hincks

19. Fig. 23.08 W. W. Norton

20. Fig. 23.09 c W. W. Norton

21. Fig. 23.10 a W. W. Norton

22. Fig. 23.10 b W. W. Norton

23. Fig. 23.11 a W. W. Norton. After Johnson, 1972

24. Fig. 23.11 b, c W. W. Norton. After Van Andel, 1994

25. Snowball Earth The Snowball Earth Hypothesis proposes that during an ice age 900 mya, the entire land and oceanic surface the Earth was covered by ice. This animation shows four proposed stages to the formation and destruction of Snowball Earth conditions: · During "normal" climate periods there are ice caps at the poles; sea level rises and falls. · During "metastable" climate times ice sheets expand and contract dramatically. · "Runaway snowball" conditions develop and ice nearly envelopes the Earth; atmospheric carbon dioxide is not absorbed by the frozen ocean. · The rising concentration of unabsorbed carbon dioxide gas leads to a "runaway greenhouse effect"; Earth warms and the ice shell rapidly vanishes. [by Declan DePaor] Play Animation Windows version >> Play Animation Macintosh version >>

26. Fig. 23.13 a W. W. Norton. After Kump et al., 1999

27. Fig. 23.13 b W. W. Norton. After Kump et al., 1999

28. Fig. 23.13 c W. W. Norton

29. Fig. 23.14 a W. W. Norton. After McKenzie, 1998

30. Fig. 23.15 a Courtesy of SOHO/MDI consortium. SOHO is a project of international cooperation between ESA and NASA

31. Fig. 23.15 b W. W. Norton. Adapted from Chaisson and McMillan, 1998

32. Fig. 23.16 a,b W. W. Norton. After Kump et al., 1999

33. Fig. 23.17 b W. W. Norton

34. Fig. 23.21 W. W. Norton. After Turco, 1997

35. Fig. 23.22 a Courtesy of GSFC/NASA

36. Fig. 23.22 b W. W. Norton. After Turco, 1997

37. Fig. 23.23 a W. W. Norton. Adapted from McKenzie, 1998

38. Fig. 23.23 b W. W. Norton. Adapted from McKenzie, 1998

39. Fig. 23.23 c W. W. Norton. Adapted from McKenzie, 1998

40. Fig. 23.24 a W. W. Norton. Adapted from McKenzie, 1998

41. Fig. 23.24 b W. W. Norton. Adapted from Kattenberg et al., 1996

42. Fig. 23.25 a W. W. Norton. Adapted from McKenzie, 1998.

43. Fig. 23.25 b W. W. Norton. Adapted from McKenzie, 1998.

44. Fig. 23.26 a W. W. Norton. Adapted from McKenzie, 1998.

45. Fig. 23.26 b W. W. Norton. Adapted from McKenzie, 1998.

46. Fig. 23.27 W. W. Norton

47. W. W. Norton & Company Independent and Employee-Owned This concludes the Norton Media Library Slide Set for Chapter 23. EARTH: Portrait of a Planet by Stephen Marshak.