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1 | |
Stars twinkle and planets do not twinkle because |
| | A) | planets shine by reflected light, and stars produce their own light. |
| | B) | all stars are pulsing light sources. |
| | C) | stars appear as point sources of light, and planets are disk sources. |
| | D) | all of the above. |
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2 | |
How much of the celestial meridian can you see from any given point on the surface of the earth? |
| | A) | one-fourth |
| | B) | one-half |
| | C) | three-fourths |
| | D) | all of it |
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3 | |
Which of the following of the coordinate system of lines depends on where you are on the surface of the earth? |
| | A) | celestial meridian |
| | B) | celestial equator |
| | C) | north celestial pole |
| | D) | None of the above is correct. |
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4 | |
The angle that you see Polaris, the North Star, above the horizon is about the same as your approximate location on |
| | A) | the celestial meridian. |
| | B) | the celestial equator. |
| | C) | a northern longitude. |
| | D) | a northern latitude. |
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5 | |
If you were at the north celestial pole looking down on the earth, how would it appear to be moving? (Use a globe if you wish.) |
| | A) | clockwise |
| | B) | counterclockwise |
| | C) | one way, then the other as a pendulum |
| | D) | It would not appear to move from this location. |
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6 | |
Your answer to question 5 means that the earth turns |
| | A) | from the west toward the east. |
| | B) | from the east toward the west. |
| | C) | at the same rate it is moving in its orbit. |
| | D) | not at all. |
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7 | |
Your answer to question 6 means that the moon, sun, and stars that are not circumpolar appear to rise in the (You may go back and change answers to previous questions if you wish) |
| | A) | west, move in an arc, then set in the east. |
| | B) | north, move in an arc, then set in the south. |
| | C) | east, move in an arc, then set in the west. |
| | D) | south, move in an arc, then set in the north. |
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8 | |
A star halfway between directly over your head and the horizon is how many degrees of arc above the horizon? |
| | A) | 45° |
| | B) | 90° |
| | C) | 135° |
| | D) | 180° |
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9 | |
In which part of a newborn star does the nuclear fusion take place? |
| | A) | convection zone |
| | B) | radiation zone |
| | C) | core |
| | D) | All of the above are correct. |
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10 | |
Which of the following stars would have the longer life spans? |
| | A) | the less massive |
| | B) | between the more massive and the less massive |
| | C) | the more massive |
| | D) | All have the same life span. |
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11 | |
A bright blue star on the main sequence is probably |
| | A) | very massive. |
| | B) | less massive. |
| | C) | between the more massive and the less massive. |
| | D) | none of the above. |
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12 | |
The brightest of the stars listed are the |
| | A) | first magnitude. |
| | B) | second magnitude. |
| | C) | fifth magnitude. |
| | D) | sixth magnitude. |
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13 | |
The basic property of a main sequence star that determines most of its other properties, including its location on the H-R diagram, is |
| | A) | brightness. |
| | B) | color. |
| | C) | temperature. |
| | D) | mass. |
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14 | |
All of the elements that are more massive than the element iron were formed in a |
| | A) | nova. |
| | B) | white dwarf. |
| | C) | supernova. |
| | D) | black hole. |
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15 | |
If the core remaining after a supernova has a mass between 1.5 and 3 solar masses, it collapses to form a |
| | A) | white dwarf. |
| | B) | neutron star. |
| | C) | red giant. |
| | D) | black hole. |
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16 | |
The basic unit of the universe is a |
| | A) | star. |
| | B) | solar system. |
| | C) | galactic cluster. |
| | D) | galaxy. |
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17 | |
The relationship between the different shapes of galaxies is |
| | A) | spherical galaxies form first, which flatten out to elliptical galaxies, then spin off spirals until they break up in irregular shapes. |
| | B) | irregular shapes form first, which collapse to spiral galaxies, then condense to spherical shapes. |
| | C) | There is no relationship as the different shapes probably resulted from different rates of swirling gas clouds. |
| | D) | none of the above. |
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18 | |
Microwave radiation from space, measurements of the expansion of the universe, the age of the oldest stars in the Milky Way galaxy, and ratios of radioactive decay products all indicate that the universe is about how old? |
| | A) | 6,000 years |
| | B) | 4.5 billion years |
| | C) | 13.7 billion years |
| | D) | 100,000 billion years |
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19 | |
Whether the universe will continue to expand or will collapse back into another big bang seems to depend on what property of the universe? |
| | A) | the density of matter in the universe |
| | B) | the age of galaxies compared to the age of their stars |
| | C) | the availability of gases and dust between the galaxies |
| | D) | the number of black holes |
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