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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
geocentric theory
Solar Eclipse
plage
Earth Rotation
2. The phase of the Moon when an increasing amount of the Moon's near side is sunlit
Galactic Bulge
Waning Moon
Waxing Moon
Spiral Galaxy
3. Jets of hot gas that extend from the Sun to around 20 -000 kilometers beyond the photosphere.
Sir Isaac Newton's laws
heliocentric theory
Closest star to the Sun
spicule
4. Sudden - violent eruption of electrically charged atomic particles from the sun's surface
Irregular Galaxy
Extra terrestrial life theory
solar flare
Closest star to the Sun
5. 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
Waxing Moon
Tidal Waves
Moon Phases
6. Example of a natural satellite - Earth's natural satellite
Extra terrestrial life theory
sun spot
neap tide
The Moon
7. 3 laws of Planetary Motion: 1. orbits are elliptical 2. Planets revolve at varying speeds 3. Planets revolve in proportion to distance from Sun
8. Occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth
retrograde motion
Earth Rotation
Solar Eclipse
Albert Einstein laws
9. The phase of the moon in which three-fourths of the moon's side that faces earth is illuminated
Solstice
The Sun
Gibbous Moon
Moon Phases
10. Two days of the year on which neither hemisphere is tilted toward or away from the sun
Earth Rotation
Zenith
Elliptical Galaxy
Equinox
11. 29.5 days
Age of Sun
moon orbit
Earth orbit
cosmic microwave background radiation
12. 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
Seasons
spicule
Horizon
13. Galaxy with a bulge in the middle and arms that extend outward in a pinwheel pattern
365.2425 (Vernal Equinox year)
Irregular Galaxy
Spiral Galaxy
Horizon
14. 4.5 billion years
Age of Sun
Solstice
Death of the Sun
local sky (observer's coordinates)
15. Earth's average distance from the Sun - which is approximately 150 million kilometers.
Spring tide
AU (Astronomical Unit)
Seasons
Galactic Cross
16. 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
Local Group
Earth orbit
neap tide
Closest star to the Sun
17. The Milky way observed through a cross section - Our solar system is 27 -000 light years away from the Galactic bulge
New Moon
Big Bang Theory
local sky (observer's coordinates)
Galactic Cross
18. Possible since carbon based planets are common - especially on Mars and Alpha Centauri
Crescent Moon
Irregular Galaxy
Extra terrestrial life theory
Polaris
19. 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
20. Apparent motion of the planets when they appear to move backwards (westward) with respect to the stars from the direction that they move ordinarily.
Extra terrestrial life theory
retrograde motion
solar flare
cosmic microwave background radiation
21. Earth is the center of the universe. Aristotelian.
The Moon
geocentric theory
Earth Rotation
Death of the Sun
22. Caused by the TILT of the Earth. - Summer = Northern hemisphere tilted closer to sun Winter = Northern hemisphere tilted farther from sun.
Closest star to the Sun
Elliptical Galaxy
Solstice
Seasons
23. The phase of the moon in which only a curved edge of the moon's side that faced earth is illuminated
Death of the Sun
Full Moon
Crescent Moon
Meridian
24. New moon - (waxing or waning) crescent moon - quarter moon - (waxing or waning) gibbous moon - and full moon
spicule
Solstice
Seasons
Moon Phases
25. The phase of the Moon when a decreasing amount of the Moon's near side is sunlit
Big Bang Theory
Irregular Galaxy
365.2425 (Vernal Equinox year)
Waning Moon
26. The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
Lunar eclipse
Spring tide
celestial sphere
Closest star to the Sun
27. Point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected
Extra terrestrial life theory
celestial sphere
Age of Sun
Zenith
28. 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
Big Bang Theory
The Moon
The Sun
Galactic Bulge
29. Only one side
retrograde motion
View of the moon
Age of Sun
New Moon
30. Every thing revolves around the sun studied by Galelo and Copernicus
Elliptical Galaxy
Death of the Sun
Spring tide
heliocentric theory
31. 23.56 hours
The Moon
Lunar eclipse
Earth orbit
Galactic Bulge
32. Dense - fusion takes place here (15 -000 -000K)
Waning Moon
sun core
moon orbit
Irregular Galaxy
33. Imaginary sphere surrounding Earth on which celestial bodies are projected.
Solstice
Age of Sun
Death of the Sun
celestial sphere
34. Imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator
Meridian
Sir Isaac Newton's laws
Crescent Moon
Closest star to the Sun
35. Galaxy with a very bright center that contains little dust and gas and is spherical to disklike in shape
celestial sphere
Elliptical Galaxy
Crescent Moon
Death of the Sun
36. 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.)
Solar Eclipse
Equinox
Crescent Moon
Albert Einstein laws
37. A gathering of roughly 30 Galaxies in which the Milky way belongs
geocentric theory
Albert Einstein laws
Local Group
sun core
38. A cycle of rise and drop in the ocean; caused be the gravitational pull of the Earth - Sun - and Moon.
Local Group
Tidal Waves
Albert Einstein laws
Spring tide
39. How long does it take for Earth to orbit the sun?
celestial sphere
solar flare
Solar Eclipse
365.2425 (Vernal Equinox year)
40. A galaxy that does not fit into any other category;
The Sun
Zenith
Moon Phases
Irregular Galaxy
41. 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
Waning Moon
Albert Einstein laws
local sky (observer's coordinates)
42. Alpha Centauri - 4.37 light years away OR Proxima Centauri - 4.24 light years away
Elliptical Galaxy
Age of Sun
Closest star to the Sun
Lunar eclipse
43. Sky as seen from wherever you happen to be standing; appears to be hemisphere or dome; only half of celestial sphere
44. Cooler and not as bright as the surrounding areas and that is caused by the sun's magnetic feild
Big Bang Theory
Solstice
Seasons
sun spot
45. Thick distribution of warm gas and stars around the galactic center.
Galactic Bulge
Irregular Galaxy
Tidal Waves
Meridian
46. Remnant radiation from the big bang - which we detect using radio telescopes
Earth orbit
cosmic microwave background radiation
Horizon
Waxing Moon
47. 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
Gibbous Moon
Albert Einstein laws
Seasons
48. When the Sun becomes a Red Giant - 10 billion years - Then a White Dwarf - aproximately 12 billion years
Death of the Sun
Waxing Moon
retrograde motion
Moon Phases
49. Twice-yearly point at which the Sun reaches its greatest distance north or south of the equator
solar flare
Polaris
New Moon
Solstice
50. Highest tidal range that occurs to the alignment of Earth - the moon - and the sun - East West pull
Spring tide
geocentric theory
Spiral Galaxy
Earth Rotation