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Test your basic knowledge |
DSST Astronomy 2
Start Test
Study First
Subjects
:
dsst
,
science
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Bright regions seen in the solar chromosphere
Horizon
geocentric theory
plage
Waxing Moon
2. 4.5 billion years
Age of Sun
Gibbous Moon
Extra terrestrial life theory
Crescent Moon
3. Galaxy with a very bright center that contains little dust and gas and is spherical to disklike in shape
Elliptical Galaxy
Death of the Sun
Irregular Galaxy
365.2425 (Vernal Equinox year)
4. 3 laws of Planetary Motion: 1. orbits are elliptical 2. Planets revolve at varying speeds 3. Planets revolve in proportion to distance from Sun
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5. Possible since carbon based planets are common - especially on Mars and Alpha Centauri
Elliptical Galaxy
Extra terrestrial life theory
New Moon
heliocentric theory
6. How long does it take for Earth to orbit the sun?
neap tide
365.2425 (Vernal Equinox year)
Equinox
Galactic Cross
7. The phase of the Moon when a decreasing amount of the Moon's near side is sunlit
heliocentric theory
Closest star to the Sun
celestial sphere
Waning Moon
8. New moon - (waxing or waning) crescent moon - quarter moon - (waxing or waning) gibbous moon - and full moon
Horizon
New Moon
Moon Phases
The Sun
9. Sudden - violent eruption of electrically charged atomic particles from the sun's surface
geocentric theory
solar flare
AU (Astronomical Unit)
Equinox
10. When the Sun becomes a Red Giant - 10 billion years - Then a White Dwarf - aproximately 12 billion years
celestial sphere
Death of the Sun
sun spot
Equinox
11. The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
geocentric theory
celestial sphere
View of the moon
Lunar eclipse
12. A gathering of roughly 30 Galaxies in which the Milky way belongs
Closest star to the Sun
Extra terrestrial life theory
Local Group
spicule
13. Almost directly over the North Pole - and does not seem to move at all. If the star rises perpendicular to the horizon - the observer is standing on the equator
Waning Moon
Polaris
Galactic Bulge
retrograde motion
14. Galaxy with a bulge in the middle and arms that extend outward in a pinwheel pattern
Spiral Galaxy
Death of the Sun
Extra terrestrial life theory
solar flare
15. Cooler and not as bright as the surrounding areas and that is caused by the sun's magnetic feild
sun spot
geocentric theory
Zenith
Earth Rotation
16. Highest tidal range that occurs to the alignment of Earth - the moon - and the sun - East West pull
Closest star to the Sun
Equinox
Horizon
Spring tide
17. Moon phase that occurs when the Moon is between Earth and the Sun - at which point the Moon cannot be seen because its lighted half is facing the Sun and its dark side faces Earth
Earth orbit
Johannes Kepler' laws
New Moon
Extra terrestrial life theory
18. 1. an object at rest willl stay at rest - and an object in motion will stay in motion at constant velocity unless acted upon by an unbalanced force 2. force = mass X acceleration 3. for every action there is an equal and opposite reaction
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19. A twice-monthly tide of minimal range that occurs when the Sun - Moon - and Earth are at right angles to each other - thus decreasing the total tidal force exerted on Earth causes North South pull
Albert Einstein laws
neap tide
Equinox
Seasons
20. The phase of the Moon when an increasing amount of the Moon's near side is sunlit
Waxing Moon
Tidal Waves
Earth Rotation
Galactic Cross
21. Jets of hot gas that extend from the Sun to around 20 -000 kilometers beyond the photosphere.
celestial sphere
spicule
Solstice
Solar Eclipse
22. The phase of the moon in which only a curved edge of the moon's side that faced earth is illuminated
Waning Moon
Crescent Moon
sun spot
heliocentric theory
23. Thick distribution of warm gas and stars around the galactic center.
Moon Phases
Local Group
Galactic Bulge
sun spot
24. Only one side
View of the moon
Solar Eclipse
365.2425 (Vernal Equinox year)
Spiral Galaxy
25. 1. Mass-Energy Equivalence (when a body has a mass it has a certain energy even if not moving); 2. General Relativity (gravitational attraction between masses is a result of the nearby masses. gravity has waves.)
heliocentric theory
Earth Rotation
Albert Einstein laws
Johannes Kepler' laws
26. Sky as seen from wherever you happen to be standing; appears to be hemisphere or dome; only half of celestial sphere
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27. Earth's average distance from the Sun - which is approximately 150 million kilometers.
Age of Sun
AU (Astronomical Unit)
Johannes Kepler' laws
View of the moon
28. Twice-yearly point at which the Sun reaches its greatest distance north or south of the equator
Galactic Bulge
Gibbous Moon
Solstice
Extra terrestrial life theory
29. Every thing revolves around the sun studied by Galelo and Copernicus
heliocentric theory
Albert Einstein laws
Zenith
Galactic Bulge
30. Imaginary sphere surrounding Earth on which celestial bodies are projected.
Extra terrestrial life theory
spicule
celestial sphere
AU (Astronomical Unit)
31. The universe originated 13.7 billion years ago from the cataclysmic explosion of a small mass of matter at extremely high density and temperature helium was present - universe is expanding and cooling
Albert Einstein laws
celestial sphere
Johannes Kepler' laws
Big Bang Theory
32. The phase of the moon in which three-fourths of the moon's side that faces earth is illuminated
Gibbous Moon
Spring tide
Albert Einstein laws
sun spot
33. Caused by the TILT of the Earth. - Summer = Northern hemisphere tilted closer to sun Winter = Northern hemisphere tilted farther from sun.
heliocentric theory
neap tide
plage
Seasons
34. Apparent line in the distance where the sky meets the sea or land
Equinox
plage
Horizon
View of the moon
35. A galaxy that does not fit into any other category;
Lunar eclipse
Irregular Galaxy
Waning Moon
Zenith
36. The Milky way observed through a cross section - Our solar system is 27 -000 light years away from the Galactic bulge
Waning Moon
local sky (observer's coordinates)
Galactic Cross
View of the moon
37. Occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth
Earth orbit
View of the moon
365.2425 (Vernal Equinox year)
Solar Eclipse
38. Point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected
Big Bang Theory
The Moon
Zenith
Albert Einstein laws
39. A cycle of rise and drop in the ocean; caused be the gravitational pull of the Earth - Sun - and Moon.
Solar Eclipse
heliocentric theory
sun spot
Tidal Waves
40. Two days of the year on which neither hemisphere is tilted toward or away from the sun
Meridian
Solstice
Equinox
Polaris
41. Alpha Centauri - 4.37 light years away OR Proxima Centauri - 4.24 light years away
Closest star to the Sun
Waning Moon
local sky (observer's coordinates)
Waxing Moon
42. Dense - fusion takes place here (15 -000 -000K)
Moon Phases
Zenith
Spiral Galaxy
sun core
43. Earth is the center of the universe. Aristotelian.
Polaris
Galactic Cross
Earth Rotation
geocentric theory
44. Imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator
View of the moon
celestial sphere
Spiral Galaxy
Meridian
45. Apparent motion of the planets when they appear to move backwards (westward) with respect to the stars from the direction that they move ordinarily.
local sky (observer's coordinates)
retrograde motion
cosmic microwave background radiation
365.2425 (Vernal Equinox year)
46. Example of a natural satellite - Earth's natural satellite
Closest star to the Sun
sun spot
The Moon
Galactic Cross
47. The sun and stars move across the sky because of this - the stars rotate around Polaris - the North Star and make a complete circle around Polaris.
spicule
Earth Rotation
365.2425 (Vernal Equinox year)
Moon Phases
48. Closet star to earth - and is a glowing ball of gas made up of 3/4 hydrogen and 1/4 helium - Produces heat by fusion - provides the gravitational pull that keeps our solar system together
Zenith
The Sun
365.2425 (Vernal Equinox year)
solar flare
49. Remnant radiation from the big bang - which we detect using radio telescopes
cosmic microwave background radiation
Solar Eclipse
heliocentric theory
Polaris
50. 23.56 hours
geocentric theory
Death of the Sun
Earth orbit
Crescent Moon