Introduction To Astronomy MCQ
1. Copernicus proposed a heliocentric model for the solar system primarily because ________.
Answer
Correct Answer:
It was much simpler than the Ptolemaic model
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2. The structure of a comet is considered to be like a large, ____, or a mass of frozen ice and rock.
Answer
Correct Answer:
Cratered moon
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3. Periodic variations in earth's orbit that can cause natural climate changes are called _________.
Answer
Correct Answer:
Milankovitch cycles
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4. The fact that mercury has no atmosphere is evidence that it _____.
Answer
Correct Answer:
Reflects a small percentage of the sunlight that strikes it.
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5. The energy that stirs the circulation in jupiter's atmosphere comes from _____.
Answer
Correct Answer:
The planet's interior
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6. In an open and grassy pine savannah, fires _____.
Answer
Correct Answer:
Prevent the development of a hardwood forest
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7. Water makes a good coolant because it has a ____
Answer
Correct Answer:
High specific heat
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8. Neptune can be divided into a total of ______________ different layers.
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9. A comets plasma tail always points directly away from the sun because __________.
Answer
Correct Answer:
Of pressure exerted by the fast-moving charged particles in the solar wind
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10. Antenna size of tvs and cell phones is related to the size of the _________ used by the technology.
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11. When we refer to the solar thermostat, we are referring to the idea that __________.
Answer
Correct Answer:
The Sun's core temperature naturally stays stable
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12. Tycho failed to detect ______ for the nova of 1572 indicating it was ______.
Answer
Correct Answer:
Parallax; beyond the orbit of Earth's moon
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13. The sun lies _______ the disk of our milky way galaxy.
Answer
Correct Answer:
About half of the way out in
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14. The _____ is a vast, spherical array of long period comet nuclei far beyond the orbit of neptune.
Answer
Correct Answer:
Oort Cloud
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15. The ____ of a telescope is a measure of its ability to increase brightness.
Answer
Correct Answer:
Light-gathering power
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16. Stars in the local sky that never cross below the horizon during the year are called ________.
Answer
Correct Answer:
Circumpolar
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17. A small group of atoms does not collapse into a clump because ________ quickly disperses them.
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18. A blackbody curve relates the wavelength of emitted light to _____.
Answer
Correct Answer:
Intensity
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19. A __________ becomes a __________ when repeated testing of its predictions does not disprove it.
Answer
Correct Answer:
Hypothesis; theory
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20. ________ meteorites are thought to be analogous in composition to earth's core.
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21. The greenhouse effect on venus is due to ________ in its atmosphere.
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22. Titan shares all of the following geological features with earth except ________.
Answer
Correct Answer:
Volcanoes erupting with molten rock
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23. The sun illuminates ________________________ of the moon at all times.
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24. The flattened circular part of the galaxy is called the galactic _________.
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25. Most irregular galaxies are thought to have formed _____.
Answer
Correct Answer:
From collisions between other galaxies.
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26. When we say that liquid water is unstable on mars today, we mean that ________.
Answer
Correct Answer:
Any liquid water on the surface would quickly either freeze or evaporate.
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27. The name given to the shape of a sagging rope supported at its ends is a __________.
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28. Measuring the amount of deuterium in the universe allows us to set a limit on _________.
Answer
Correct Answer:
The density of ordinary (baryonic) matter the universe
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29. Mars has two moons that are most similar in character to ________.
Answer
Correct Answer:
Small asteroids
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30. The sun will exhaust its nuclear fuel in about ________.
Answer
Correct Answer:
5 billion years
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31. The imaginary boundary between the earth and sky is called the _________.
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32. The orbits of ____ lie closer to the sun than does earth's orbit.
Answer
Correct Answer:
Mercury and Venus
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33. The length of daylight on the moon is about ________.
Answer
Correct Answer:
Two weeks.
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34. When we say that the sun is a ball of plasma, we mean that ________.
Answer
Correct Answer:
The Sun consists of gas in which many or most of the atoms are ionized (missing electrons).
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35. The radio source ________ is located in a place consistent with the center of our galaxy.
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36. The martian "blueberries" are ________.
Answer
Correct Answer:
Pebble-sized spheres containing the mineral hematite
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37. The light-gathering power of a 4-meter telescope is __________ than that of a 2-meter telescope.
Answer
Correct Answer:
4 times larger
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38. The leading hypothesis for venus's lack of a global magnetic field is its ________.
Answer
Correct Answer:
Slow rotation
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39. The frequency of sunspots and related solar activity is ________.
Answer
Correct Answer:
An 11 year cycle
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40. The ________ magnitude of a star depends directly upon its luminosity and distance.
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41. That earth ____ , evidence that earth differentiated.
Answer
Correct Answer:
Has an average density that is lower than the density of the crust
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42. On the graphs shown, you can identify an ice age by looking for __________.
Answer
Correct Answer:
A trough (bottom of a dip) on the temperature graph
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43. Most asteroids inhabit the asteroid belt between the planets ________.
Answer
Correct Answer:
Mars and Jupiter.
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44. If the 1908 tunguska impact had instead struck a city, it likely would have ________.
Answer
Correct Answer:
Killed much of the city's population
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45. Gaps in the asteroid belt (often called kirkwood gaps) are caused by ______.
Answer
Correct Answer:
Orbital resonances with Jupiter
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46. Comets falling into the inner solar system from the ____ are called long-period comets.
Answer
Correct Answer:
Oort cloud
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47. Among discovered meteorites, we have found some with all the following origins except _________.
Answer
Correct Answer:
Being a fragment from Comet Halley
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48. According to current evidence, pluto is best explained as ______.
Answer
Correct Answer:
A large member of the Kuiper belt.
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49. A main-sequence star twice as massive as the sun would last __________.
Answer
Correct Answer:
Much less than half as long as the Sun
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50. Degenearcy pressure arises when ________.
Answer
Correct Answer:
Subatomic particles are packed as tightly as the laws of quantum mechanics allow
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51. The great contribution of nicholas copernicus was to ________.
Answer
Correct Answer:
Create a detailed model of our solar system with the Sun rather than Earth at the center
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52. A ____ has a few million light sensitive diodes in an array typically about a half-inch square.
Answer
Correct Answer:
Charge-coupled device
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53. Visible light from a distant star can be spread into a spectrum by using a glass prism or ______.
Answer
Correct Answer:
A diffraction grating.
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54. Compared to the underlying photosphere and chromosphere, the corona is _____ in temperature.
Answer
Correct Answer:
Much hotter
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55. The energy in the atmospheres of most of the jovian planets comes ___________,
Answer
Correct Answer:
Both the Sun and their interiors, in roughly equal proportions
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56. Any place where groundwater naturally flows out of earths surface is termed a(n) ________.
Answer
Correct Answer:
The animation shows that any location on Earth
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57. Craters on the surface of the moon are caused by the impact of _______________.
Answer
Correct Answer:
The Earth
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58. Radio telescopes measure the galaxys distribution of _____.
Answer
Correct Answer:
Hydrogen from which stars are formed
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59. Radio telescopes would not represent a good choice for astronomical study of ________.
Answer
Correct Answer:
Ordinary stars
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60. The energy balance that contributes to the solar thermostat is a balance between __________.
Answer
Correct Answer:
The energy released in the core by fusion and the energy radiated from the Sun's surface into space
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61. Parallax measurements of the distances to the nearest stars use _____ as a baseline.
Answer
Correct Answer:
Earth's orbit
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62. Most pulsars are observed only as ________ sources.
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63. In essence, the kepler mission searched for extrasolar planets by ____________.
Answer
Correct Answer:
Monitoring stars for slight dimming that might occur as unseen planets pass in front of them
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64. We can study how galaxies evolve because ______.
Answer
Correct Answer:
The farther away we look, the further back in time we see.
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65. The james webb space telescope is designed primarily to observe __________.
Answer
Correct Answer:
Infrared light
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66. Stellar occultations are the most accurate way to measure the _________ of a solar system object.
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67. Spiral arms appear bright because ________.
Answer
Correct Answer:
They contain more hot young stars than other parts of the disk
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68. Over time, the star-gas-star cycle leads the gas in the milky way to ________.
Answer
Correct Answer:
Have a greater abundance of heavy elements
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69. Its massafter a supernova explosion, the remains of the stellar core ________.
Answer
Correct Answer:
May be either a neutron star or a black hole
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70. A typical meteor is created by a particle about the size of a _________.
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71. The largest geographic feature on the surface of planet earth is __________.
Answer
Correct Answer:
Pacific ocean
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72. To calculate the masses of stars in a binary system, we must measure their ________.
Answer
Correct Answer:
Orbital period and average orbital distance.
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73. The surface features of ________ are known only through satellite radar mapping.
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74. The light collecting area of a telescope is larger in telescopes which have a larger ____________.
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75. The velocities of seismic waves traveling from earthquake foci ________.
Answer
Correct Answer:
Increase at a constant rate with depth
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76. The cores of the terrestrial worlds are made mostly of metal because ______.
Answer
Correct Answer:
Metals sunk to the centers a long time ago when the interiors were molten throughout
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77. It is diffraction that limits the ________ of a telescope of a given objective diameter.
Answer
Correct Answer:
Resolution
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78. The transit method allows us in principle to find planets around __________.
Answer
Correct Answer:
Only a small fraction of stars that have planets
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79. The processes responsible for virtually all surface geology are ________.
Answer
Correct Answer:
Impact cratering, volcanisms, tectonics, and erosion.
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80. The main source of energy for a star as it grows in size to become a red giant is ______.
Answer
Correct Answer:
Hydrogen fusion in a shell surrounding the central core
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81. The graph shows that galaxies with high speeds as measured from earth are __________.
Answer
Correct Answer:
Moving away from Earth and are farther from Earth than galaxies with lower speeds
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82. All ____ galaxies are spiral galaxies that have small luminous nuclei.
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83. A typical white dwarf is ________.
Answer
Correct Answer:
As massive as the Sun but only about as large in size as the Earth.
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84. Based on this diagram, "red sequence" galaxies are __________ than "blue cloud" galaxies.
Answer
Correct Answer:
Redder and more luminous
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85. According to hubble's law, the larger galaxy's redshift, the greater its _____.
Answer
Correct Answer:
Farther it is from us
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86. Current understanding holds that a galaxy's type (spiral, elliptical, or irregular) ______.
Answer
Correct Answer:
Infrared light
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87. If you suspect someone you know may attempt suicide, you should __________.
Answer
Correct Answer:
Help them talk through their issues
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88. A terrestrial world's lithosphere is ________.
Answer
Correct Answer:
A layer of relatively strong, rigid rock, encompassing the crust and part of the mantle
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89. The unusually bright centers found in some galaxies are called ________.
Answer
Correct Answer:
Active galactic nuclei.
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90. Overall, jupiter's composition is most like that of ________.
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91. If we say that a galaxy has a lookback time of 1 billion years, we mean that _________.
Answer
Correct Answer:
Its light traveled through space for 1 billion years to reach us.
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92. Essentially all the hydrogen nuclei that will ever exist in our universe were created __________.
Answer
Correct Answer:
By the time the universe was about 3 minutes old
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93. Collisions between galaxies typically unfold over a period of ______.
Answer
Correct Answer:
Hundreds of millions of years.
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94. Carbon fusion occurs in high-mass stars but not in low-mass stars because _________.
Answer
Correct Answer:
The cores of low-mass stars never get hot enough for carbon fusion
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95. Because of the conservation of angular momentum, as a star collapses ________.
Answer
Correct Answer:
It must rotate faster
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96. An angle of 1 arcsecond is _________.
Answer
Correct Answer:
Less than the thickness of a human hair held at arm's length
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97. According to hubble's law, as the distance to galaxies ________, the ________ increases.
Answer
Correct Answer:
Increases; apparent recessional velocity
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98. A spinning neutron star has been observed at the center of a ________.
Answer
Correct Answer:
Supernova remnant
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Astronomy MCQs | Topic-wise
