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