1404_Ch 21 Assignment

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School

Lone Star College System, North Harris *

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1404

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Geology

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Dec 6, 2023

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docx

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Uploaded by DeaconWolverineMaster977

PHYS 1404: Chapter 21 – Venus and Mars - Assignment © 2018-2023 Lone Star College. All Rights Reserved. Write your Name. Do not alter header or question numbers. Abide by LSC Academic Integrity. Name:Sebastjon 1. A sidereal day on Venus is 243 Earth days, and a year on Venus is 224.7 Earth days. 2. Why do we need radio waves to study the surface of Venus? _______ Venus has a thick atmosphere which makes optical observations of its surface impossible 3. Name two contrasts and two similarities between Earth and Venus. Both planets have almost the same size and density and Venus is only a 30% closer to the Sun than Earth . Since Venus has about the same size and composition as Earth, we might expect its geology to be similar. This is partly true, but Venus does not exhibit the same kind of plate tectonics as Earth , and we will see that its lack of erosion results in a very different surface appearance. 4. Do you think one would be able to survive on the surface of Venus with a spacesuit? Why or why not? _____ Venus' high surface pressure, which is 90 times that of Earth's. Without a strong spacesuit, you'd be instantly squashed. 5. The high concentration of _________ in Venus’s atmosphere contributes to the _______ effect. 6. What evidence do we have that neither Mars nor Venus are dominated by tectonic activity the way the Earth is?

PHYS 1404: Chapter 21 – Venus and Mars - Assignment © 2018-2023 Lone Star College. All Rights Reserved. Write your Name. Do not alter header or question numbers. Abide by LSC Academic Integrity. Neither Mars nor Venus have a surface divided into plates _ _____ 7. What is the cause of Mars’s reddish surface? Well, a lot of rocks on Mars are full of iron, and when they're exposed to the great outdoors, they 'oxidize' and turn reddish 8. Which hemisphere of Mars (northern or southern) is probably older? How do we know this? the southern highlands of Mars represent the oldest crust . 9. What are the three periods of Mar’s planetary history? a. Noachian, Hesperian, and Amazonian . b. c. 10. Give two examples that demonstrate evidence for flowing surface water at some point in Mars’s history. - A large delta and relatively flat basin of rock in the northern hemisphere is indicative of a liquid water sea - The valley networks look like meandering riverbeds that may have formed over longer periods 11. Observations of Mars have found traces of a magnetic field frozen into the crust. What does this tell us about Mars’s evolution as a planet?

PHYS 1404: Chapter 21 – Venus and Mars - Assignment © 2018-2023 Lone Star College. All Rights Reserved. Write your Name. Do not alter header or question numbers. Abide by LSC Academic Integrity. This suggests that the presence of crustal magnetic fields has had a moderate impact on atmospheric ion loss throughout Martian history, potentially influencing the planet's atmospheric evolution 12. Go to the current events and read the recent article “NASA images showcase eerie beauty of winter on Mars”. Write 5 - 10 sentence summary about it. NASA has released a video revealing that Mars transforms into an otherworldly wonderland during winter, with dust driving Martian weather. The planet is known for its snow, ice, and frost, with temperatures dropping as low as minus 190 degrees Fahrenheit at the poles. Dry ice, carbon dioxide-based snow, can land on the surface, and a few feet of snow fall in flat regions near the poles. No orbiters or rovers have been able to see snow fall on Mars due to the weather phenomenon only occurring at the poles beneath cloud cover at night. 13. Go to the current events and read the article “Venus: The Basics”. Write 5 - 10 sentence summary about it. Venus, often referred to as Earth's twin, is a hellish planet with a hot surface and thick atmosphere. It has a day longer than its year and lacks seasons. Venus may have been a habitable ocean world billions ago, but a runaway greenhouse effect turned surface water into vapor, which leaked into space. Today, Venus' surface is blasted by high temperatures and pressures. While it is unlikely to be life-bearing today, it may hold lessons about what it takes for life to start on Earth, in our solar system, or across the galaxy. Studying why Venus' habitability differs could help us understand what could make other worlds

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1404_Ch 21 Assignment

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