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