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