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