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