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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. Only one side
Tidal Waves
celestial sphere
Crescent Moon
View of the moon
2. Caused by the TILT of the Earth. - Summer = Northern hemisphere tilted closer to sun Winter = Northern hemisphere tilted farther from sun.
Seasons
Solar Eclipse
Age of Sun
New Moon
3. Twice-yearly point at which the Sun reaches its greatest distance north or south of the equator
Solstice
Local Group
Sir Isaac Newton's laws
heliocentric theory
4. Apparent line in the distance where the sky meets the sea or land
Horizon
Full Moon
Crescent Moon
New Moon
5. Two days of the year on which neither hemisphere is tilted toward or away from the sun
spicule
local sky (observer's coordinates)
Equinox
Irregular Galaxy
6. Sudden - violent eruption of electrically charged atomic particles from the sun's surface
solar flare
plage
Extra terrestrial life theory
Tidal Waves
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
View of the moon
spicule
Solar Eclipse
neap tide
8. Dense - fusion takes place here (15 -000 -000K)
Irregular Galaxy
Age of Sun
sun core
plage
9. Example of a natural satellite - Earth's natural satellite
Earth orbit
The Moon
retrograde motion
Albert Einstein laws
10. Alpha Centauri - 4.37 light years away OR Proxima Centauri - 4.24 light years away
Extra terrestrial life theory
Spiral Galaxy
geocentric theory
Closest star to the Sun
11. Phase that occurs when all of the Moon's surface facing Earth reflects light.
Seasons
plage
Full Moon
moon orbit
12. New moon - (waxing or waning) crescent moon - quarter moon - (waxing or waning) gibbous moon - and full moon
retrograde motion
heliocentric theory
Moon Phases
Big Bang Theory
13. The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
Lunar eclipse
Earth Rotation
heliocentric theory
AU (Astronomical Unit)
14. A gathering of roughly 30 Galaxies in which the Milky way belongs
Death of the Sun
Polaris
Local Group
spicule
15. 4.5 billion years
Earth Rotation
Irregular Galaxy
Age of Sun
365.2425 (Vernal Equinox year)
16. The phase of the Moon when a decreasing amount of the Moon's near side is sunlit
Sir Isaac Newton's laws
Waning Moon
New Moon
Closest star to the Sun
17. Thick distribution of warm gas and stars around the galactic center.
Meridian
Galactic Bulge
Gibbous Moon
Local Group
18. 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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19. 29.5 days
Equinox
Solar Eclipse
moon orbit
heliocentric theory
20. Remnant radiation from the big bang - which we detect using radio telescopes
plage
cosmic microwave background radiation
Solstice
AU (Astronomical Unit)
21. The phase of the moon in which three-fourths of the moon's side that faces earth is illuminated
Gibbous Moon
Spring tide
Lunar eclipse
New Moon
22. Cooler and not as bright as the surrounding areas and that is caused by the sun's magnetic feild
Albert Einstein laws
Death of the Sun
Solstice
sun spot
23. Galaxy with a very bright center that contains little dust and gas and is spherical to disklike in shape
Elliptical Galaxy
solar flare
Local Group
View of the moon
24. 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
The Moon
Moon Phases
New Moon
The Sun
25. 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 Rotation
Irregular Galaxy
Galactic Bulge
365.2425 (Vernal Equinox year)
26. The Milky way observed through a cross section - Our solar system is 27 -000 light years away from the Galactic bulge
Galactic Cross
Extra terrestrial life theory
Solar Eclipse
Solstice
27. Occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth
sun core
Solar Eclipse
Solstice
plage
28. 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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29. 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
neap tide
Closest star to the Sun
Waxing Moon
30. Possible since carbon based planets are common - especially on Mars and Alpha Centauri
celestial sphere
Lunar eclipse
Extra terrestrial life theory
Local Group
31. Earth is the center of the universe. Aristotelian.
geocentric theory
Full Moon
AU (Astronomical Unit)
Gibbous Moon
32. A galaxy that does not fit into any other category;
Horizon
Irregular Galaxy
heliocentric theory
Crescent Moon
33. Every thing revolves around the sun studied by Galelo and Copernicus
365.2425 (Vernal Equinox year)
celestial sphere
cosmic microwave background radiation
heliocentric theory
34. When the Sun becomes a Red Giant - 10 billion years - Then a White Dwarf - aproximately 12 billion years
cosmic microwave background radiation
celestial sphere
Sir Isaac Newton's laws
Death of the Sun
35. How long does it take for Earth to orbit the sun?
spicule
The Moon
365.2425 (Vernal Equinox year)
sun core
36. Bright regions seen in the solar chromosphere
AU (Astronomical Unit)
Horizon
plage
365.2425 (Vernal Equinox year)
37. Point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected
Zenith
Moon Phases
View of the moon
Irregular Galaxy
38. Highest tidal range that occurs to the alignment of Earth - the moon - and the sun - East West pull
Spring tide
sun core
Waning Moon
Albert Einstein laws
39. A cycle of rise and drop in the ocean; caused be the gravitational pull of the Earth - Sun - and Moon.
Tidal Waves
Local Group
sun spot
Spiral Galaxy
40. Imaginary sphere surrounding Earth on which celestial bodies are projected.
sun core
Solstice
Elliptical Galaxy
celestial sphere
41. 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
The Moon
Big Bang Theory
Full Moon
Age of Sun
42. 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
Galactic Cross
The Sun
Sir Isaac Newton's laws
moon orbit
43. The phase of the moon in which only a curved edge of the moon's side that faced earth is illuminated
Local Group
Crescent Moon
Tidal Waves
View of the moon
44. Jets of hot gas that extend from the Sun to around 20 -000 kilometers beyond the photosphere.
spicule
local sky (observer's coordinates)
Waning Moon
AU (Astronomical Unit)
45. 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
Equinox
Gibbous Moon
Polaris
Solstice
46. 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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47. 23.56 hours
Galactic Bulge
local sky (observer's coordinates)
Earth orbit
Sir Isaac Newton's laws
48. Apparent motion of the planets when they appear to move backwards (westward) with respect to the stars from the direction that they move ordinarily.
retrograde motion
Tidal Waves
Death of the Sun
Full Moon
49. Earth's average distance from the Sun - which is approximately 150 million kilometers.
sun core
AU (Astronomical Unit)
Age of Sun
Sir Isaac Newton's laws
50. The phase of the Moon when an increasing amount of the Moon's near side is sunlit
Lunar eclipse
Sir Isaac Newton's laws
Zenith
Waxing Moon