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Astronomy
Test 1 (part 1)
| Question | Answer |
|---|---|
| Which of the choices below correctly lists things in order from largest to smallest? | universe, local group, milky way, solar system |
| An effective theory must: | be continuously tested. |
| Aristotle's hypothesis was that: | only a spherical Earth would always cast a circular shadow on the Moon |
| About how many stars are visible on a clear, dark night with the naked eye alone? | a few thousand |
| Into how many constellations is the celestial sphere divided? | 88 |
| What are constellations? | groups of stars making an apparent pattern in the celestial sphere |
| Where on Earth would you be if Polaris was at your Zenith? | North Pole |
| Why did early civilizations observe constellations? | For practical reasons, such as navigation and helping to determine seasons |
| While watching a star, you see it moves 15 degrees across the sky. How long have you been watching it? | 1 hour |
| How long is the precession cycle? | 26,000 years |
| The place the Sun stops its northward motion along the ecliptic is the: | summer solstice |
| The places where the Sun crosses the equator are called the: | equinoxes |
| Seasons on Earth are primarily caused by: | the tilt of the Earth's rotational axis |
| You note that a particular star is directly overhead. It will be directly overhead again in: | 23 hours 56 minutes |
| That Polaris will not always be the pole star is due to: | precession shifting the celestial pole |
| What celestial line is a product of the Earth's orbit around the Sun? | Ecliptic |
| The constellations of the zodiac fall along: | the ecliptic |
| When the Sun rises, it is located in the constellation Gemini. When the Sun sets later that same day, it will be: | In the constellation Gemini |
| Which statement about the length of a day is false? | The sidereal day includes both the Earth's rotation and revolution around the Sun. |
| The angular size of an object depends on which two quantities? | the object's actual size and its distance from us |
| If the angular size of a spherical object is known, along with its distance from Earth, What third quantity can be determined? | the object's diameter |
| A solar eclipse can only happen during a: | new moon |
| If the Moon rose tonight at 6pm, then tomorrow it will rise about: | 7pm |
| If you are in the Moon's umbral shadow, the you will witness: | a total solar eclipse |
| Which statement about the first quarter moon if False? | From the Earth, it appears 25% sunlit |
| If new moon fell on March 2nd, what is the Moon's phase on March 14th? | waxing gibbous |
| Why is there a two day difference in the sidereal and synodic months? | The Earth is also revolving around the Sun, so the Moon must "catch up" |
| Driving eastward just before sunrise, if you observe the Moon in the eastern sky, its phase must be: | waning Crescent |
| When the Moon is directly opposite the Sun in ht sky, its phase is: | full |
| The last quarter phase of the Moon: | crosses the meridian at sunrise |
| What conditions are necessary for a partial solar eclipse? | new moon on ecliptic, with us in the penumbral shadow |
| Some type of solar eclipse will happen about: | about every six months at new moon |
| The star Wolf 1061 has a parallax of 2.34 arcseconds, while the star Ross 652 has a parallax of 1.70 arcseconds. What can you correctly conclude? | Wolf 1061 is closer to Earth than Ross 652 |
| Which of the following describes parallax? | It is inversely proportional to the distance to the star |
| A star with a large parallax: | is at a short distance from Earth |
Created by:
graync