1. LECTURE 10, SEPTEMBER 28, 2010 ASTR 101, SECTION 3 INSTRUCTOR, JACK BRANDT jcbrandt@unm.edu 1ASTR 101-3, FALL 2010

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9. Question 1 Mercury’s surface most resembles which of these? a) the Moon’s far side b) Venus’ polar regions c) Earth’s deserts d) the Moon’s near side e) Mars’ deserts

10. Question 1 Mercury’s surface most resembles which of these? a) the Moon’s far side b) Venus’ polar regions c) Earth’s deserts d) the Moon’s near side e) Mars’ deserts Both Mercury and the Moon’s far side are heavily cratered.

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15. Question 6 Which of the following inner solar system bodies has the densest atmosphere? a) Mercury b) Venus c) Earth d) Moon e) Mars

16. Question 6 a) Mercury b) Venus c) Earth d) Moon e) Mars Venus’ atmosphere has a pressure about 90 times larger than Earth’s. Many of its surface features are affected by this immense pressure. Which of the following inner solar system bodies has the densest atmosphere?

17. Question 7 The greenhouse effect on Venus is due to ______ in its atmosphere. a) nitrogen b) hydrogen c) carbon dioxide d) oxygen e) sulfuric acid

18. Question 7 The greenhouse effect on Venus is due to ______ in its atmosphere. Venus’ atmosphere is over 96% CO 2, resulting in a surface temperature exceeding 900 ° F. a) nitrogen b) hydrogen c) carbon dioxide d) oxygen e) sulfuric acid

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25. Question 10 Which of the following inner solar system bodies has the largest volcanoes? a) Mercury b) Venus c) Earth d) Mars e) Moon

26. Question 10 a) Mercury b) Venus c) Earth d) Mars e) Moon Mars’ largest volcano, Olympus Mons, rises more than 25 km (75,000 ft) above the surrounding plains. Which of the following inner solar system bodies has the largest volcanoes?

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29. What was the most likely source of the water that formed the huge outflow channels of Mars? Question 13 a) rainfall b) catastrophic but rare flooding c) annual melting of the seasonal ice caps d) large comets that struck Mars e) a collision with one of Jupiter’s frozen moons

30. What was the most likely source of the water that formed the huge outflow channels of Mars? Question 13 a) rainfall b) catastrophic but rare flooding c) annual melting of the seasonal ice caps d) large comets that struck Mars e) a collision with one of Jupiter’s frozen moons Flooding on Mars appears to have occurred about 3 billion years ago.

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34. ASTR 101-3, FALL 2010 ATMOSPHERIC EVOLUTION- COMPARATIVE PLANETOLOGY-1 EARTH-Primary atmosphere (Gone) vs. secondary atmosphere (Needed). Oceans, require external source. Oxygen on Earth requires life. Nitrogen relatively inert. VENUS-Runaway Greenhouse Effect. Even if there were oceans, all water lost. See Fig. 6.34. 34

35. ASTR 101-3, FALL 2010 ATMOSPHERIC EVOLUTION- COMPARATIVE PLANETOLOGY-2 MARS-May have been “Earth Like” in the past. Lost much of its atmosphere due to collisions and escape. With no Greenhouse Effect, the temperature dropped. Gases combined with the surface materials and perhaps froze out of the atmosphere. 35

36. Venus and Mars probably evolved differently from Earth because Question 11 a) they are slightly bigger than Earth. b) they are more massive than Earth. c) they have thicker atmospheres than Earth. d) they formed sooner than Earth. e) they orbit at different distances from the Sun.

37. Venus and Mars probably evolved differently from Earth because Question 11 a) they are slightly bigger than Earth. b) they are more massive than Earth. c) they have thicker atmospheres than Earth. d) they formed sooner than Earth. e) they orbit at different distances from the Sun.