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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. When the Sun becomes a Red Giant - 10 billion years - Then a White Dwarf - aproximately 12 billion years
Death of the Sun
geocentric theory
Seasons
local sky (observer's coordinates)
2. How long does it take for Earth to orbit the sun?
Tidal Waves
retrograde motion
sun spot
365.2425 (Vernal Equinox year)
3. Phase that occurs when all of the Moon's surface facing Earth reflects light.
Local Group
sun spot
Full Moon
Elliptical Galaxy
4. The phase of the Moon when a decreasing amount of the Moon's near side is sunlit
Elliptical Galaxy
Waning Moon
Closest star to the Sun
AU (Astronomical Unit)
5. Galaxy with a very bright center that contains little dust and gas and is spherical to disklike in shape
Big Bang Theory
Elliptical Galaxy
Sir Isaac Newton's laws
Gibbous Moon
6. The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
retrograde motion
Albert Einstein laws
heliocentric theory
Lunar eclipse
7. 3 laws of Planetary Motion: 1. orbits are elliptical 2. Planets revolve at varying speeds 3. Planets revolve in proportion to distance from Sun
8. Point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected
Closest star to the Sun
Zenith
celestial sphere
Age of Sun
9. Sky as seen from wherever you happen to be standing; appears to be hemisphere or dome; only half of celestial sphere
10. A cycle of rise and drop in the ocean; caused be the gravitational pull of the Earth - Sun - and Moon.
Tidal Waves
Lunar eclipse
spicule
New Moon
11. Occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth
New Moon
Solar Eclipse
Earth Rotation
neap tide
12. Jets of hot gas that extend from the Sun to around 20 -000 kilometers beyond the photosphere.
Elliptical Galaxy
Galactic Cross
spicule
moon orbit
13. Twice-yearly point at which the Sun reaches its greatest distance north or south of the equator
Zenith
Waning Moon
neap tide
Solstice
14. Sudden - violent eruption of electrically charged atomic particles from the sun's surface
solar flare
Galactic Bulge
Sir Isaac Newton's laws
New Moon
15. The Milky way observed through a cross section - Our solar system is 27 -000 light years away from the Galactic bulge
Horizon
Galactic Cross
Extra terrestrial life theory
Waning Moon
16. 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
Elliptical Galaxy
New Moon
Closest star to the Sun
moon orbit
17. Caused by the TILT of the Earth. - Summer = Northern hemisphere tilted closer to sun Winter = Northern hemisphere tilted farther from sun.
Local Group
Death of the Sun
Irregular Galaxy
Seasons
18. Apparent line in the distance where the sky meets the sea or land
Gibbous Moon
Horizon
Moon Phases
heliocentric theory
19. Possible since carbon based planets are common - especially on Mars and Alpha Centauri
Extra terrestrial life theory
Closest star to the Sun
Johannes Kepler' laws
Spiral Galaxy
20. Two days of the year on which neither hemisphere is tilted toward or away from the sun
Equinox
Lunar eclipse
Galactic Bulge
Extra terrestrial life theory
21. A gathering of roughly 30 Galaxies in which the Milky way belongs
moon orbit
Galactic Bulge
Crescent Moon
Local Group
22. The phase of the moon in which three-fourths of the moon's side that faces earth is illuminated
Sir Isaac Newton's laws
Earth Rotation
local sky (observer's coordinates)
Gibbous Moon
23. Only one side
View of the moon
Lunar eclipse
Crescent Moon
Equinox
24. Example of a natural satellite - Earth's natural satellite
Johannes Kepler' laws
local sky (observer's coordinates)
The Moon
Extra terrestrial life theory
25. Cooler and not as bright as the surrounding areas and that is caused by the sun's magnetic feild
sun spot
Crescent Moon
Solstice
local sky (observer's coordinates)
26. Alpha Centauri - 4.37 light years away OR Proxima Centauri - 4.24 light years away
Closest star to the Sun
solar flare
Full Moon
Local Group
27. Imaginary sphere surrounding Earth on which celestial bodies are projected.
Meridian
celestial sphere
The Sun
Elliptical Galaxy
28. 23.56 hours
Irregular Galaxy
spicule
Big Bang Theory
Earth orbit
29. The phase of the moon in which only a curved edge of the moon's side that faced earth is illuminated
Galactic Cross
The Moon
Crescent Moon
Tidal Waves
30. Remnant radiation from the big bang - which we detect using radio telescopes
cosmic microwave background radiation
neap tide
Death of the Sun
Albert Einstein laws
31. 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
32. Highest tidal range that occurs to the alignment of Earth - the moon - and the sun - East West pull
sun core
Spring tide
Local Group
Full Moon
33. Dense - fusion takes place here (15 -000 -000K)
365.2425 (Vernal Equinox year)
Solstice
Age of Sun
sun core
34. Earth is the center of the universe. Aristotelian.
local sky (observer's coordinates)
moon orbit
geocentric theory
Closest star to the Sun
35. Imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator
sun core
heliocentric theory
Meridian
Equinox
36. The phase of the Moon when an increasing amount of the Moon's near side is sunlit
Spring tide
Tidal Waves
Albert Einstein laws
Waxing Moon
37. 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.
Equinox
Earth Rotation
Local Group
heliocentric theory
38. 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
Local Group
neap tide
sun core
Elliptical Galaxy
39. Thick distribution of warm gas and stars around the galactic center.
Galactic Bulge
Closest star to the Sun
sun spot
solar flare
40. 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
spicule
The Sun
Solstice
Polaris
41. A galaxy that does not fit into any other category;
Irregular Galaxy
Crescent Moon
heliocentric theory
Seasons
42. Every thing revolves around the sun studied by Galelo and Copernicus
AU (Astronomical Unit)
Waxing Moon
Age of Sun
heliocentric theory
43. 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
The Moon
local sky (observer's coordinates)
Polaris
Earth Rotation
44. Earth's average distance from the Sun - which is approximately 150 million kilometers.
365.2425 (Vernal Equinox year)
New Moon
AU (Astronomical Unit)
Sir Isaac Newton's laws
45. Galaxy with a bulge in the middle and arms that extend outward in a pinwheel pattern
365.2425 (Vernal Equinox year)
Spiral Galaxy
The Sun
heliocentric theory
46. Apparent motion of the planets when they appear to move backwards (westward) with respect to the stars from the direction that they move ordinarily.
Waning Moon
celestial sphere
retrograde motion
Tidal Waves
47. 4.5 billion years
Meridian
Age of Sun
solar flare
retrograde motion
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
sun core
New Moon
49. 29.5 days
moon orbit
Johannes Kepler' laws
Earth orbit
Waning Moon
50. Bright regions seen in the solar chromosphere
Solar Eclipse
Irregular Galaxy
plage
Equinox