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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. The phase of the Moon when a decreasing amount of the Moon's near side is sunlit
Galactic Cross
celestial sphere
Full Moon
Waning Moon
2. Remnant radiation from the big bang - which we detect using radio telescopes
celestial sphere
cosmic microwave background radiation
Big Bang Theory
Waning Moon
3. Bright regions seen in the solar chromosphere
Age of Sun
plage
Galactic Cross
Johannes Kepler' laws
4. Occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth
AU (Astronomical Unit)
sun core
Solar Eclipse
Tidal Waves
5. Imaginary sphere surrounding Earth on which celestial bodies are projected.
Irregular Galaxy
heliocentric theory
celestial sphere
Seasons
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
Earth Rotation
New Moon
The Moon
Solstice
7. 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
Gibbous Moon
Local Group
Irregular Galaxy
neap tide
8. Earth's average distance from the Sun - which is approximately 150 million kilometers.
Irregular Galaxy
365.2425 (Vernal Equinox year)
AU (Astronomical Unit)
Moon Phases
9. Apparent motion of the planets when they appear to move backwards (westward) with respect to the stars from the direction that they move ordinarily.
Crescent Moon
Polaris
retrograde motion
neap tide
10. New moon - (waxing or waning) crescent moon - quarter moon - (waxing or waning) gibbous moon - and full moon
Polaris
neap tide
Moon Phases
View of the moon
11. Phase that occurs when all of the Moon's surface facing Earth reflects light.
Earth Rotation
The Sun
Full Moon
geocentric theory
12. Apparent line in the distance where the sky meets the sea or land
Horizon
Zenith
Seasons
Polaris
13. Thick distribution of warm gas and stars around the galactic center.
AU (Astronomical Unit)
Extra terrestrial life theory
heliocentric theory
Galactic Bulge
14. A galaxy that does not fit into any other category;
365.2425 (Vernal Equinox year)
Irregular Galaxy
solar flare
Earth orbit
15. Dense - fusion takes place here (15 -000 -000K)
moon orbit
Galactic Bulge
Equinox
sun core
16. A gathering of roughly 30 Galaxies in which the Milky way belongs
cosmic microwave background radiation
Local Group
Closest star to the Sun
Sir Isaac Newton's laws
17. 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
Local Group
Earth orbit
retrograde motion
Polaris
18. Every thing revolves around the sun studied by Galelo and Copernicus
heliocentric theory
geocentric theory
Death of the Sun
spicule
19. Example of a natural satellite - Earth's natural satellite
Earth Rotation
The Moon
Zenith
Solar Eclipse
20. When the Sun becomes a Red Giant - 10 billion years - Then a White Dwarf - aproximately 12 billion years
Death of the Sun
New Moon
Equinox
Zenith
21. The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
sun core
local sky (observer's coordinates)
Death of the Sun
Lunar eclipse
22. The Milky way observed through a cross section - Our solar system is 27 -000 light years away from the Galactic bulge
Galactic Cross
Big Bang Theory
Polaris
Local Group
23. Point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected
View of the moon
Zenith
Big Bang Theory
retrograde motion
24. Alpha Centauri - 4.37 light years away OR Proxima Centauri - 4.24 light years away
Waning Moon
Closest star to the Sun
Moon Phases
Earth orbit
25. 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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26. Only one side
retrograde motion
View of the moon
Waning Moon
heliocentric theory
27. 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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28. Cooler and not as bright as the surrounding areas and that is caused by the sun's magnetic feild
Big Bang Theory
The Sun
Sir Isaac Newton's laws
sun spot
29. The phase of the Moon when an increasing amount of the Moon's near side is sunlit
Tidal Waves
solar flare
Waxing Moon
Johannes Kepler' laws
30. A cycle of rise and drop in the ocean; caused be the gravitational pull of the Earth - Sun - and Moon.
Tidal Waves
Waning Moon
Local Group
Gibbous Moon
31. The phase of the moon in which three-fourths of the moon's side that faces earth is illuminated
Earth orbit
Gibbous Moon
Extra terrestrial life theory
Galactic Cross
32. Galaxy with a very bright center that contains little dust and gas and is spherical to disklike in shape
Elliptical Galaxy
Spiral Galaxy
Galactic Cross
Extra terrestrial life theory
33. 23.56 hours
cosmic microwave background radiation
Spring tide
Earth orbit
geocentric theory
34. 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
Seasons
heliocentric theory
Elliptical Galaxy
35. The phase of the moon in which only a curved edge of the moon's side that faced earth is illuminated
Big Bang Theory
Horizon
365.2425 (Vernal Equinox year)
Crescent Moon
36. Twice-yearly point at which the Sun reaches its greatest distance north or south of the equator
Spring tide
Local Group
Solstice
Full Moon
37. Sudden - violent eruption of electrically charged atomic particles from the sun's surface
solar flare
Sir Isaac Newton's laws
celestial sphere
Waning Moon
38. Possible since carbon based planets are common - especially on Mars and Alpha Centauri
Galactic Bulge
Spiral Galaxy
Zenith
Extra terrestrial life theory
39. Imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator
Local Group
Closest star to the Sun
Meridian
Zenith
40. 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
365.2425 (Vernal Equinox year)
solar flare
celestial sphere
41. Highest tidal range that occurs to the alignment of Earth - the moon - and the sun - East West pull
Gibbous Moon
cosmic microwave background radiation
Spring tide
Galactic Bulge
42. Earth is the center of the universe. Aristotelian.
Seasons
View of the moon
sun core
geocentric theory
43. Caused by the TILT of the Earth. - Summer = Northern hemisphere tilted closer to sun Winter = Northern hemisphere tilted farther from sun.
Earth orbit
Tidal Waves
Solar Eclipse
Seasons
44. Galaxy with a bulge in the middle and arms that extend outward in a pinwheel pattern
Spiral Galaxy
Irregular Galaxy
moon orbit
local sky (observer's coordinates)
45. 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
Earth Rotation
Spring tide
Sir Isaac Newton's laws
46. 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
Solstice
Big Bang Theory
Sir Isaac Newton's laws
Galactic Cross
47. 29.5 days
moon orbit
Waning Moon
Crescent Moon
heliocentric theory
48. 4.5 billion years
Closest star to the Sun
Solar Eclipse
Age of Sun
cosmic microwave background radiation
49. 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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50. How long does it take for Earth to orbit the sun?
365.2425 (Vernal Equinox year)
sun spot
Johannes Kepler' laws
plage