quiz 7 Astronomy

1. Venus is brightest as seen from Earth: Student Response Value Correct Answer A. at superior conjunction, and fully lit.  B. 36 days before or after inferior conjunction, appearing as a large crescent. 100%    C. at greatest eastern elongation, appearing half lit in the evening sky. D. at inferior conjunction, when closest to Earth and largest in apparent size. E. at greatest western elongation, appearing half lit in the morning sky. Score: 1/1 2. At closest approach Venus is about how far from Earth? Student Response Value Correct Answer  A. 0.3 AU 100%    B. 0.4 AU C. 0.1 AU D. 0.7 AU E. 0.5 AU Score: 1/1 3. Why is it reasonable to conclude that the internal structure and evolution of Venus are basically Earthlike? Student Response Value Correct Answer A. They have similar surface features and sizes. B. They have similar chemical compositions and surface features. C. They have similar atmospheres and chemical compositions. D. They have similar atmospheres and masses.  E. They have similar masses and sizes. 100%    Score: 1/1 4. In the time between two closest approaches to Earth, Venus rotates almost exactly five times relative to the sun. The consequence of this is that: Student Response Value Correct Answer A. Earth always presents the same face to Venus at inferior conjunction. B. Venus' rotation is completely unrelated to the distant Earth. C. Venus presents the opposite hemisphere to Earth at each superior conjunction.  D. Venus always presents the same face to Earth at inferior conjunction. 100%    E. Venus presents the opposite hemisphere to Earth at each inferior conjunction. Score: 1/1 5. Venus' rotation: Student Response Value Correct Answer A. axis is highly tilted to its orbital plane, causing large seasonal changes. B. is tidally locked to the Sun. C. is the fastest of the terrestrial planets.  D. takes longer than its orbit around the Sun. 100%    E. is counterclockwise, like the other planets. Score: 1/1 6. The synodic period of Venus is about how many Earth years? Student Response Value Correct Answer A. about 0.7 years B. about 2 years  C. about 3.5 years 100%    D. about 1.25 years E. about 5 years Score: 1/1 7. Our best data about the surface topography of Venus has come from: Student Response Value Correct Answer A. orbiter photos from Pioneer Venus Orbiter. B. radio and visual observations.  C. Magellan radar data and radar observations of the planet from Earth. 100%    D. the three flybys of Mariner 10. E. spacecraft flybys like Mariner 2 and visual observations of the planet. Score: 1/1 8. Which statement is true of Venus' surface? Student Response Value Correct Answer A. It has remained unchanged for billions of years. B. Atmospheric pressure is very low.  C. There are two continent sized uplands. 100%    D. There is an extensive hydrosphere. E. There are no shield volcanoes. Score: 1/1 9. Maxwell Mons on Venus is a huge: Student Response Value Correct Answer A. ocean basin larger than the Pacific Ocean.  B. shield volcano. 100%    C. tectonic mountain chain, like the Himalayas. D. rift valley. E. impact crater larger than Texas. Score: 1/1 10. The main problem spacecraft have encountered in landing on Venus is: Student Response Value Correct Answer A. the thick atmosphere. B. the rocky surface. C. the acid rain.  D. the extremely high temperatures. 100%    E. the strong winds. Score: 1/1 11. What is the main constituent of the atmosphere of Venus? Student Response Value Correct Answer A. oxygen B. sulfuric acid C. nitrogen D. hydrogen  E. carbon dioxide 100%    Score: 1/1 12. Volcanic activity on Venus is thought to be: Student Response Value Correct Answer  A. more frequent, but less violent than volcanic activity on Earth. 0% B. less frequent, but more violent than volcanic activity on Earth.    C. more frequent and more violent than volcanic activity on Earth. D. less frequent and less violent than volcanic activity on Earth. E. the same as volcanic activity on Earth. Score: 0/1 13. What is the result of the Greenhouse effect on the surface environment of Venus? Student Response Value Correct Answer  A. It has raised the surface temperature by hundreds of degrees Celsius 100%    B. Its effect is about the same as on Earth. C. It causes the surface temperature of Venus to become hotter than the Sun. D. It has reduced the surface temperature by about 30 degrees Celsius. E. It has little or no effect. Score: 1/1 14. Which of the following contributes to Venus being so hot? Student Response Value Correct Answer A. Its atmosphere is made chiefly of carbon dioxide. B. It has very little axial tilt so the equator is always directly exposed to the Sun. C. Its atmosphere is much denser than the Earth's. D. It is closer than Earth to the Sun.  E. All of the above are factors. 100%    Score: 1/1 15. What is the composition of the clouds of Venus? Student Response Value Correct Answer A. a combination of ammonia and methane, like Uranus  B. sulfur and sulfuric acid droplets 100%    C. hydrogen sulfide and ammonia D. frozen carbon dioxide, as on Mars E. water, like Earth's clouds Score: 1/1 16. Most of the time, Venus is the third-brightest object in the sky. Student Response Value Correct Answer True 100% True Score: 1/1 17. Venus has a highly eccentric orbit, accounting for its large temperature extremes. Student Response Value Correct Answer False 100% False Score: 1/1 18. Venus is almost the same size, mass, and density as the Earth. Student Response Value Correct Answer True 100% True Score: 1/1 19. Venus' surface temperature is fairly uniform, hot on both day and night sides. Student Response Value Correct Answer True 100% True Score: 1/1 20. No evidence of impact craters has been found on Venus. Student Response Value Correct Answer False 100% False Score: 1/1 21. Venus has larger volcanoes than Earth's Hawaii. Student Response Value Correct Answer True 100% True Score: 1/1 22. Venus' rotation period is longer than its year. Student Response Value Correct Answer True 100% True Score: 1/1