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