final exam study

1. 1Which of the following has your "address" in the correct order?
   
   

   1. Ayou, Earth, solar system, Local Group, Local Supercluster, Milky Way
   2. Byou, Earth, solar system, Milky Way, Local Supercluster, Local Group
   3. Cyou, Earth, solar system, Milky Way, Local Group, Local Supercluster
   4. Dyou, Earth, Local Group, Local Supercluster, solar system, Milky Way
   5. Eyou, Earth, solar system, Local Group, Milky Way, Local Supercluster
2. 2About where is our solar system located within the Milky Way Galaxy?
   
   

   1. Aabout half way from the center of the galaxy to the outskirts of the galactic disk
   2. Babout 10 percent of the way from the center of the galaxy to the outskirts of the galactic disk
   3. Cat the center of the galaxy
   4. Dnear the far outskirts of the galactic disk
   5. Ein the halo of the galaxy above the galactic disk
3. 3What do we mean when we say that the universe is expanding?
   
   

   1. AAverage distances are increasing between star systems within galaxies
   2. BIndividual galaxies are gradually growing in size.
   3. CEverything in the universe is gradually growing in size.
   4. DThe statement is not meant to be literal; rather, it means that our knowledge of the universe is growing.
   5. EAll galaxies are increasingly moving away from one another.
4. 4The age of the universe is

   1. Abetween 10 million and 16 million years.
   2. Bbetween 100 million and 160 million years.
   3. Cbetween 100 billion and 160 billion years.
   4. Dbetween 1 billion and 1.6 billion years.
   5. Ebetween 10 billion and 16 billion years.
5. 5Which of the following statements does not use the term light-year in an appropriate way?
   
   

   1. AIt will take me light-years to complete this homework assignment.
   2. BA light-year is about 10 trillion kilometers.
   3. CThe Milky Way Galaxy is about 100,000 light-years in diameter.
   4. DIt will take the Voyager spacecraft about 20,000 years to travel just 1 light-year.
   5. EIt's about 4 light-years from here to Alpha Centauri.
6. 6Suppose we look at a photograph of many galaxies. Assuming that all galaxies formed at about the same time, which galaxy in the picture is the youngest?
   
   

   1. Athe one that is farthest away
   2. Bthe one that is bluest in color
   3. Cthe one that is reddest in color
   4. Dthe one that is closest to us
   5. Ethe one that appears smallest in size
7. 7What do we mean by the observable universe?
   
   

   1. Athe part of the universe that could be observed in principle, including things that may require future technologies
   2. Bthe compendium of all objects that we have observed to date
   3. Cthe part of the universe that we can see through telescopes
   4. Dthe entire universe, since it is inconceivable that there could be parts of the universe that we cannot observe
   5. Ethe part of the universe that we can see with the naked eye
8. 8What is nuclear fusion?
   
   

   1. Aa process that only occurs in bombs
   2. Bthe process of splitting nuclei to produce energy
   3. Cthe process of combining lightweight nuclei to make heavier nuclei
   4. Dthe process of turning matter into pure energy
   5. Ean explosion caused by putting together two volatile chemicals
9. 9All galaxies beyond those local to the Milky Way appear to be receding from us.
   
   

   1. AVerdadeiro
   2. BFalso
10. 10Approximately how fast are you moving with the rotation of Earth?
    
    

    1. A1,300 km/hr
    2. B13,000 km/hr
    3. C13 km/hr
    4. D130 km/hr
    5. Enot moving at all

11. 11How long does it take our solar system to complete one orbit around the Milky Way Galaxy?
    
    

    1. A230 million years
    2. B10 thousand years
    3. C100 million years
    4. D230 thousand years
    5. E1 million years
12. 12Most of the mass in the Milky Way Galaxy is located
    
    
    
    
    
    

    1. Ain the stars in the spiral arms.
    2. Bin the halo (above/below the disk).
    3. Cin the central bulge of the galaxy.
    4. Dwithin the disk.
    5. Ein the gas and dust.
13. 13The distribution of the mass of the Milky Way Galaxy is determined by
    
    
    
    
    

    1. Adetermining the amount of gas and dust.
    2. Bweighing various parts of the Milky Way.
    3. Cstudying the rotation of the galaxy.
    4. Dstudying how stars are distributed in the Milky Way.
    5. Ecounting the number of stars.
14. 14Imagine that we put a raisin cake into the oven, with each raisin separated from the others by 1 cm. An hour later, we take it out and the distances between raisins are 3 cm. If you lived in one of the raisins and watched the other raisins as the cake expanded, which of the following would you conclude?
    
    
    
    
    
    

    1. AMore distant raisins would be moving away from you faster.
    2. BMore distant raisins would be moving away from you more slowly.
    3. CThe raisins would be expanding too, so everything would look identical to the original situation.
    4. DAll raisins would be moving away from you at the same speed.
    5. EIt depends: If you lived in a raisin near the edge of the cake, you'd see other raisins moving away from you, but they'd be coming toward you if you lived in a raisin near the center of the cake.
15. 15Earth is always precisely 1 AU from the Sun.

    1. AVerdadeiro
    2. BFalso
16. 16Is the actual size of the universe larger than 14 billion light years?

    1. AThe universe must be exactly equal in size to its age, so it must not be larger than 14 billion light years across in size.
    2. BWe do not have enough information to know this.
    3. CIt is only 14 billion light years across to us; to an observer 10 billion light years away, it is smaller.
    4. DThe observable universe is 14 billion light years in each direction, so the actual universe is greater than 14 billion light years across.
17. 17The rotational speed of the Earth near the equator is 0.46 [km/sec].
    
    

    1. AVerdadeiro
    2. BFalso
18. 18The solar system itself orbits the Galactic Center at the orbital speed of about 800,000 km/hour. Express this speed in [km/sec].

    1. A222
    2. B323
19. 19In the neighborhood of the solar system, stars (including our Sun) are randomly moving around with respect to each other. Express how fast the Sun moves relative to the nearby local stars in [km/sec].

    1. A69-72
    2. B18-20
    3. C10-12
20. 20When you fly eastward over the Atlantic ocean (e.g. from NY to London), it normally takes [blank_start]shorter flight time[blank_end] because of [blank_start]the jet stream[blank_end] .

    1. Ashorter flight time
    2. Bthe jet stream
21. 21By locating the north celestial pole (NCP) in the sky, how can you determine your latitude?

    1. AThe altitude of the NCP is the same as your distance from the North Pole.
    2. BThe azimuth of the NCP is the same as your latitude.
    3. CThe altitude of the NCP is your angular distance from the North Pole.
    4. DThe azimuth of the NCP is the angular distance from the North Pole.
    5. EThe altitude of the NCP is the same as your latitude.
22. 22Which of the following best describes the modern definition of a constellation?

    1. Aa region of the celestial sphere
    2. Ba group of stars that all lie at about the same distance from Earth
    3. Ca collection of stars that are near one another in space
    4. Da Greek mythological figure
    5. Ea pattern of bright stars in the sky
23. 23Which of the following statements about the celestial sphere is NOT true?
    
    

    1. AWhen we look in the sky, the stars all appear to be located on the celestial sphere.
    2. BThe celestial sphere does not exist physically.
    3. CThe "celestial sphere" is just another name for our universe.
    4. DEarth is placed at the center of the celestial sphere.
    5. EFrom any location on Earth, we can see only half the celestial sphere at any one time.
24. 24How many arcseconds are in 1° (one degree)?

    1. A100
    2. B60
    3. C10,000
    4. D3,600
    5. E360
25. 25We can describe a position on Earth's surface by stating its...

    1. Alatitude and direction.
    2. Baltitude and direction.
    3. Caltitude and azimuth.
    4. Dlatitude and longitude.
    5. Emeridian and longitude.
26. 26Why do we have seasons on Earth?

    1. AEarth's distance from the Sun varies, so that it is summer when we are closer to the Sun and winter when we are farther from the Sun.
    2. BThe tilt of Earth's axis constantly changes between 0 and 23 1/2°, giving us summer when Earth is tilted more and winter when it is straight up
    3. CAs Earth goes around the Sun and Earth's axis remains pointed toward Polaris, the Northern and Southern hemispheres alternately receive more and less direct sunlight.
    4. DSeasons are caused by the influence of the planet Jupiter on our orbit.
27. 27The seasons on Earth are caused by its elliptical orbit around the Sun.

    1. AVerdadeiro
    2. BFalso
28. 28Which of the following statements is true?

    1. AA. Both the Northern and Southern hemispheres receive the same amount of sunlight on the solstices.
    2. BB. Both A and C are true.
    3. CC. The Northern Hemisphere receives the most direct sunlight on the summer solstice.
    4. DD. The Southern Hemisphere receives the most direct sunlight on the summer solstice.
    5. EE. Both the Northern and Southern hemispheres receive the same amount of sunlight on the equinoxes.
29. 29Which of the following statements is true?

    1. ABoth the Northern and Southern hemispheres receive the same amount of sunlight on the equinoxes.
    2. BThe Southern Hemisphere receives the most direct sunlight on the summer solstice.
    3. CThe Northern Hemisphere receives the most direct sunlight on the summer solstice.
    4. DBoth the Northern and Southern hemispheres receive the same amount of sunlight on the solstices.
30. 30If the Moon is rising at midnight, the phase of the Moon must be

    1. Afull
    2. Bthird quarter.
    3. Cwaning crescent.
    4. Dwaxing crescent.
    5. Efirst quarter.
31. 31What conditions are required for a solar eclipse?

    1. AThe phase of the Moon must be new, and the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun.
    2. BThe phase of the Moon must be new, and the Moon's orbital plane must lie in the ecliptic.
    3. CThe phase of the Moon can be new or full, and the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun.
    4. DThe phase of the Moon must be full, and the Moon's orbital plane must lie in the ecliptic.
    5. EThe phase of the Moon must be full, and the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun.
32. 32What conditions are required for a lunar eclipse?

    1. AThe phase of the Moon must be full, and the Moon's orbital plane must lie in the ecliptic.
    2. BThe phase of the Moon must be new, and the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun.
    3. CThe phase of the Moon must be new, and the Moon's orbital plane must lie in the ecliptic.
    4. DThe phase of the Moon must be full, and the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun.
    5. EThe phase of the Moon can be new or full, and the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun.
33. 33Why do we see essentially the same face of the Moon at all times?

    1. Abecause the Moon's rotational and orbital periods are equal
    2. Bbecause the Sun illuminates only one half at a time
    3. Cbecause the other face points toward us only at new Moon, when we can't see the Moon
    4. Dbecause the Moon has a nearly circular orbit around Earth
    5. Ebecause the Moon does not rotate
34. 34What happens during the apparent retrograde motion of a planet?

    1. AThe planet moves backward through the sky over the course of a night.
    2. BThe planet moves backward in its orbit around the Sun.
    3. CThe planet rises in the west and sets in the east.
    4. DThe planet appears to move westward with respect to the stars over a period of many nights.
    5. EThe planet moves through constellations that are not part of the zodiac.
35. 35Why are lunar eclipses more commonly seen than solar eclipses?

    1. ALunar eclipses occur at night and are easier to see.
    2. BThe Earth casts a bigger shadow than the Moon.
    3. CThe Moon is much closer to the Earth than the Sun.
    4. DThe Moon goes around the Earth faster than the Earth goes around the Sun.
    5. EThe tilt of the Moon's axis is smaller than the Earth's.
36. 36Why were ancient peoples unable to detect stellar parallax?

    1. AThey did not have the ability to measure very small angles.
    2. BThey could not see distant stars.
    3. CThey did not observe for long enough periods of time.
    4. DThey did detect it, but they rejected the observations.
    5. EThey did not look for it.
37. 37Choose the correct definition of precession, and the correct explanation how does it affect what we see in our sky?

    1. AThe speed of Earth’s rotation changes slowly over the centuries, and we call this change “precession.” Because of this change, the celestial poles and therefore the pole star change slowly in time.
    2. BThe direction in which Earth’s rotation axis points in space changes slowly over the centuries, and we call this change “precession.” Because of this movement, the celestial poles and therefore the pole star change slowly in time.
    3. CThe direction in which Earth’s rotation axis points in space changes slowly over the centuries, and we call this change “precession.” Because of this movement, the celestial poles and therefore the pole star remain the same.
    4. DThe speed of Earth’s rotation changes slowly over the centuries, and we call this change “precession.” Because of this change, the celestial poles and therefore the pole star remain the same.
38. 38The diameter of the Sun is 1.4 × 10^11 cm and its distance to the nearest star, Proxima Centauri, is 4.2 light years (ly). Suppose you want to build an exact scale model of the Sun and Proxima Centauri, and you are using a ball of 15 cm in diameter to represent the Sun. On your scale model, approximately how far away would Proxima Centauri be from the Sun? Give your numerical answer in units of kilometers (km), but don't put units in your answer.

    1. A42
    2. B425
    3. C4250
    4. D42500
39. 39planets [blank_start]8[blank_end]
    moons [blank_start]more than 200[blank_end]
    asteroids [blank_start]more than one million[blank_end]
    comets [blank_start]more than a few thousand[blank_end]
    dwarf planets [blank_start]5[blank_end]

    1. A8
    2. Bmore than 200
    3. Cmore than one million
    4. Dmore than a few thousand
    5. E5
40. 40In modern astronomy, some planets may be regarded as

    1. Aicy
    2. Bstrongly charged
    3. Chollow/void
    4. Dhighly turbulent
41. 41What is the primary fundamental difference between stars and planets?

    1. Athe presence of thermonuclear fission
    2. Bthe presence of H2O (water)
    3. Cthe presence of magnetic fields
    4. Dthe presence of ice
    5. Ealmost none
    6. Fthe presence of thermonuclear fusion
42. 42The Sun orbits the Galactic Center in

    1. Athousands of years
    2. Btens of billions of years
    3. Chundreds of years
    4. Dhundreds of millions of years
43. 43Which of the following speeds is the highest in comparison?
    
    

    1. AThe Solar system's orbital speed around the Galactic Center
    2. BThe Sun's rotational speed
    3. CThe Earth's orbital speed around the Sun
    4. DThe Earth's rotational speed
44. 44According to the modern cosmology, today's universe is approximately (on the order of)

    1. Acurrently not known
    2. B1 Gyrs old
    3. C10 Myrs sold
    4. D100 Myrs old
    5. E10 Gyrs old
    6. F100 Gyrs old
45. 45In the current framework of the modern cosmology, which one of the following is believed to exist?
    
    

    1. Aalien civilization/UFOs
    2. Bwhite holes
    3. Canti-gravity materials
    4. Dmagnetic charges
    5. Eworm holes
    6. Fdark matter
46. 46There exists a specific center of the universe.

    1. AVerdadeiro
    2. BFalso
47. 47A distant bright star located at 700 light-years was observed at the Earth. Which one of the following is NOT physically possible?

    1. AThe star may have been formed at 600 years ago.
    2. BThe star may have been formed at 800 years ago.
    3. CThe star must be younger than the universe.
    4. DThe star may not be present at the time of this observation.
48. 48The Milky Way Galaxy's "rotation curve" can primarily tell us, among others, something essential about

    1. Athe mass of the supermassive black hole at the Galactic Center
    2. Ball of the above
    3. Cthe intensity of light emitted from the Galactic Center
    4. Dthe amount of invisible dark matter
    5. Ethe location of the Sun
49. 49Hubble's law by Edwin Hubble states that

    1. Athe more distant in the universe, the faster it is expanding.
    2. Bevery single object in the universe is moving away from each other everywhere.
    3. Cthe universe is static and featureless.
    4. Dall the galaxies are randomly moving.
50. 50What is believed to be present right at the Galactic Center (GC)?

    1. Awhite dwarfs
    2. Bdark matter
    3. Ca supermassive black hole
    4. Dmassive stars
    5. Estar forming gas
51. 51Which one of the following best characterizes the Earth rotation?

    1. Aconstant rotational velocity [m/s]
    2. Bmagnetic field
    3. Crigid body rotation
    4. Ddifferential rotation
    5. Enone of the above

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Astronomy Quiz sobre final exam study, criado por Olivia Orta-Vargas em 08-12-2025.

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Olivia Orta-Vargas

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