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