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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. The phase of the moon in which three-fourths of the moon's side that faces earth is illuminated
Age of Sun
Gibbous Moon
Crescent Moon
Polaris
2. 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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3. 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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4. Earth's average distance from the Sun - which is approximately 150 million kilometers.
Solar Eclipse
AU (Astronomical Unit)
plage
sun spot
5. Bright regions seen in the solar chromosphere
local sky (observer's coordinates)
Earth orbit
plage
Solstice
6. 29.5 days
Full Moon
Tidal Waves
moon orbit
neap tide
7. New moon - (waxing or waning) crescent moon - quarter moon - (waxing or waning) gibbous moon - and full moon
Earth Rotation
solar flare
Full Moon
Moon Phases
8. Earth is the center of the universe. Aristotelian.
Extra terrestrial life theory
Gibbous Moon
Spring tide
geocentric theory
9. Galaxy with a bulge in the middle and arms that extend outward in a pinwheel pattern
Spiral Galaxy
solar flare
Galactic Cross
Age of Sun
10. 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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11. Phase that occurs when all of the Moon's surface facing Earth reflects light.
Waning Moon
Full Moon
plage
cosmic microwave background radiation
12. The phase of the moon in which only a curved edge of the moon's side that faced earth is illuminated
Crescent Moon
Closest star to the Sun
Polaris
Gibbous Moon
13. 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
Solar Eclipse
Closest star to the Sun
Big Bang Theory
heliocentric theory
14. 4.5 billion years
heliocentric theory
sun spot
Irregular Galaxy
Age of Sun
15. Cooler and not as bright as the surrounding areas and that is caused by the sun's magnetic feild
Gibbous Moon
Crescent Moon
sun spot
Galactic Bulge
16. Twice-yearly point at which the Sun reaches its greatest distance north or south of the equator
View of the moon
Moon Phases
Solstice
Horizon
17. Possible since carbon based planets are common - especially on Mars and Alpha Centauri
Earth orbit
Extra terrestrial life theory
Moon Phases
The Sun
18. The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
365.2425 (Vernal Equinox year)
Crescent Moon
Lunar eclipse
Death of the Sun
19. A gathering of roughly 30 Galaxies in which the Milky way belongs
Local Group
Extra terrestrial life theory
Waning Moon
Elliptical Galaxy
20. When the Sun becomes a Red Giant - 10 billion years - Then a White Dwarf - aproximately 12 billion years
Death of the Sun
The Sun
Galactic Bulge
heliocentric theory
21. Caused by the TILT of the Earth. - Summer = Northern hemisphere tilted closer to sun Winter = Northern hemisphere tilted farther from sun.
Moon Phases
Meridian
Seasons
The Moon
22. Point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected
Closest star to the Sun
plage
Waxing Moon
Zenith
23. Thick distribution of warm gas and stars around the galactic center.
Galactic Bulge
plage
Crescent Moon
Polaris
24. Apparent line in the distance where the sky meets the sea or land
Waxing Moon
Horizon
heliocentric theory
Big Bang Theory
25. Every thing revolves around the sun studied by Galelo and Copernicus
sun spot
Death of the Sun
Meridian
heliocentric theory
26. Apparent motion of the planets when they appear to move backwards (westward) with respect to the stars from the direction that they move ordinarily.
Earth orbit
Moon Phases
Meridian
retrograde motion
27. The phase of the Moon when a decreasing amount of the Moon's near side is sunlit
Earth orbit
AU (Astronomical Unit)
Full Moon
Waning Moon
28. Occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth
Irregular Galaxy
New Moon
Solar Eclipse
Horizon
29. 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
Johannes Kepler' laws
Seasons
New Moon
local sky (observer's coordinates)
30. 23.56 hours
Spiral Galaxy
Earth orbit
neap tide
Johannes Kepler' laws
31. Two days of the year on which neither hemisphere is tilted toward or away from the sun
Crescent Moon
local sky (observer's coordinates)
Equinox
Lunar eclipse
32. Sudden - violent eruption of electrically charged atomic particles from the sun's surface
Earth orbit
Big Bang Theory
solar flare
celestial sphere
33. Imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator
celestial sphere
Spiral Galaxy
Moon Phases
Meridian
34. Remnant radiation from the big bang - which we detect using radio telescopes
Galactic Bulge
spicule
cosmic microwave background radiation
Big Bang Theory
35. How long does it take for Earth to orbit the sun?
solar flare
Solstice
365.2425 (Vernal Equinox year)
Spring tide
36. The phase of the Moon when an increasing amount of the Moon's near side is sunlit
Elliptical Galaxy
solar flare
Solar Eclipse
Waxing Moon
37. A cycle of rise and drop in the ocean; caused be the gravitational pull of the Earth - Sun - and Moon.
Equinox
Closest star to the Sun
Age of Sun
Tidal Waves
38. 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
Solar Eclipse
Death of the Sun
plage
neap tide
39. A galaxy that does not fit into any other category;
sun core
Albert Einstein laws
Irregular Galaxy
View of the moon
40. Imaginary sphere surrounding Earth on which celestial bodies are projected.
Tidal Waves
celestial sphere
The Moon
retrograde motion
41. Alpha Centauri - 4.37 light years away OR Proxima Centauri - 4.24 light years away
Full Moon
plage
Closest star to the Sun
Elliptical Galaxy
42. The Milky way observed through a cross section - Our solar system is 27 -000 light years away from the Galactic bulge
Galactic Cross
Johannes Kepler' laws
Albert Einstein laws
Equinox
43. 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.
Earth Rotation
Galactic Bulge
sun spot
Meridian
44. Only one side
Spiral Galaxy
View of the moon
sun spot
Albert Einstein laws
45. 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.)
sun spot
Lunar eclipse
Albert Einstein laws
Crescent Moon
46. Galaxy with a very bright center that contains little dust and gas and is spherical to disklike in shape
365.2425 (Vernal Equinox year)
Death of the Sun
Moon Phases
Elliptical Galaxy
47. Dense - fusion takes place here (15 -000 -000K)
Johannes Kepler' laws
sun core
celestial sphere
Crescent Moon
48. Highest tidal range that occurs to the alignment of Earth - the moon - and the sun - East West pull
cosmic microwave background radiation
Zenith
Seasons
Spring tide
49. 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
Elliptical Galaxy
local sky (observer's coordinates)
50. Jets of hot gas that extend from the Sun to around 20 -000 kilometers beyond the photosphere.
Sir Isaac Newton's laws
spicule
Crescent Moon
local sky (observer's coordinates)