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Astronomy
Test 3: Lessons 7,8,9. (part.2)
| Question | Answer |
|---|---|
| What makes the view of Mars in the summer of 2003 so spectacular? | Mars was both at perihelion and opposition, creating the perfect viewing conditions from Earth. |
| Which of the following are irregularities in our solar system that must be explainable in models of planetary formation? | All of the above |
| In terms of its thick and chemically active atmosphere of hydrocarbons, which jovian moon was visited by the Huygens probe in 2005? | Titan |
| Which of the following appears most favored most favored by natural selection? | Intelligence |
| Taking the total number of the stars in the Milky Way and dividing by the age of the Milky Way is a way to estimate: | The star formation rate in the Milky Way. |
| The unusual nature of viruses has caused scientists to consider the possibility that: | The definition of life may be more complex than a simple check list. |
| What is meant by the "habitable zone?" | The region around each star where terrestrial planets could have liquid water on their surfaces |
| Which type of star would have the largest habitable zone? | O5V |
| What other recent hypotheses would corroborate the hypothesis that life on Earth originated in space? (Choose all that apply.) | Meteorites containing amino acids |
| What important molecules of life did Miller and Urey brew up? | Amino acids |
| Choose the list that is correct in order of size from largest to smallest. | DNA, genes, amino acids, carbon dioxide |
| Which of these technological advances would make it harder for extraterrestrial life to find us? | Cable TV |
| Which of these radio waves would fall in the "water hole"? | 19 cm wavelength |
| During which step in cosmic evolution did diverse life forms begin to arise? | biological evolution |
| The last step in cosmic evolution is | cultural evolution |
| If the material for life were introduced from space after the Earth formed, a major carrier would have been: | comet impacts |
| Evidence gathered from observations of exoplanets indicates approximately what percentage of stars have planets? | 100 |
| How does Drake define a technological civilization? | One that can communicate over interstellar distances |
| 94) A similar experiment was more recently done by NASA using an icy mixture of water, methanol, ammonia and carbon monoxide. The mixture was exposed to ultraviolet radiation... The purpose of this experiment was to determine whether | Amino acids could form in the harsh vacuum of outer space. |
| The first probe carrying mankind's message to alien civilizations was: | Pioneer 10 |
| Organic molecules are: | Carbon-based |
| If we are optimistic in our assumptions about the development of life and intelligence, then the number of technological civilizations in the galaxy should equal the | Average lifetime of a civilization. |
| Which four moons of the jovian planets show the most promise of life? | Ganymede, Titan, Miranda, Enceladus |
| When was the first confirmed exoplanet discovered? | Near the end of the 20th century |
| When looking for the radial velocity changes or "wobbles" detected due to Doppler shifts, which mass combination is most likely to be detected? | Low mass star, high mass planet |
| Why has direct imaging found so few exoplanets? | Exoplanets are faint and are usually close to their parent stars. |
| A planet is located orbiting another star and its radius is about 3 times that of the earth. It is: | A super-Earth |
| Hot Jupiters are thought to have moved closer to their parent star than where they originated due to: | Gravitational interactions with the gas disk. |
| Most extrasolar Neptunes and Jupiters found to date have: | Orbits that are more eccentric than those of planets in our solar system, with eccentricities greater than 0.1. |
| Extrasolar planetary systems are similar to our solar system in all of the following ways, EXCEPT: | For the presence of hot Jupiters in some systems |
| The habitable zone is the area around a star where: | Temperatures are suitable for planets to have liquid water. |
| What is the difference between a hot Jupiter and a cold Jupiter? | Hot Jupiters orbit close to the parent stars; cold Jupiters do not. |
| When we are lucky enough to see an extrasolar planet transit its star | We can find the planet's size, mass, and density by the drop in light. |
| Which statement about extrasolar planets found to date is true? | Some are so close to their stars that their periods are just a few days |
| In the process of planetary formation, when would the inward migration of Jupiters have most likely occurred? | After these planets had reached full size, but before terrestrial planets had finished forming |
| The radius of a super-Earth generally falls in the range: | Between 1.25 and 2 Earth radii. |
| So far, beyond the solar system the extrasolar planets found have been mostly | Large jovians with terrestrial-type orbits |
| The largest shield volcano yet discovered is: | Olympus Mons on Mars. |
| The runoff channels on Mars were most likely formed by? | Catastrophic, but rare flooding |
| What causes the changing dark and light features visible on the Martian surface from Earth? | Highly cratered and eroded areas that are frequently covered and uncovered by dust |
| Evidence for a permafrost layer of ice just a few meters below the surface of Mars include: | "Fluidized ejecta" craters |
| The NASA mission(s) that landed on Mars in 1976 was (were) the: | Vikings I and II. |
| How long is a day on Mars? | 24 hours, 36 minutes |
| The Tharsis Bulge on Mars is roughly the size of: | North America |
| The largest difference between Mars' northern and southern hemispheres is that: | The southern appears older, with more impact craters. |
| Evidence of liquid water in Mars' distant past suggests that it had a substantial atmosphere compared to what it has presently. What happened to is water vapor? | The water vapor has frozen out into the polar ice caps and permafrost as Mars has cooled |
| What piece of evidence suggests that the martian moons did NOT form with Mars? | Their composition is significantly different from Mars and the terrestrial planets |
Created by:
graync