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