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Test your basic knowledge |
Cosmology
Start Test
Study First
Subject
:
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. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
Negative - Diverge - Less than 1
standard candle
HII Region
Flat - Remain Parallel - Exactly 1
2. A term referring to the orbital character of stars near the Sun
Differential Rotation
Photon
Parsec
Grand design spirals
3. A small spherical dark nebula
Chandrasekhar Limit
Bok Globule
regolith
Perihelion
4. A small spherical dark nebula
Bok Globule
deferent
Steady State Theory (Leads to Olber's Paradox)
Chandrasekhar Limit
5. The study of the universe as a whole.
mass
Secondary Mirror
H2 Regions
cosmology
6. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.
AGN
Kuiper belt
tectonics of Venus
comet
7. Is there water on the moon?
Planetary Nebula
MOONS: roundest shape
Yes - frozen at the poles- remains protected from the suns rays
acceleration
8. The larger bodies that formed early in teh solar nebula that were chemically differentiated
Make up of the jovian planets
interstellar dust
planetesimal
Primary Mirror
9. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density
density parameter
Kirchhoff's Law
density
Clouds of sufuric acid (very inhospitable and brightest object in the sky) - process called greenhouse affect traps radiation making it 900 degrees at times - spins with retrograde rotation (sun rises in west) and takes 58.4 days for it to set. Thick
10. When one side of a body always faces the planet it revolves around
accretion disk
Autumnal Equinox
synchronous rotation
Heliocentric
11. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE
Stephen-Boltzman Law
Lagrangian Razor
Ganymede (Jupiter)
Chromosphere
12. The oldest grouping of stars - found in the galaxy halo
chemical differentiation
3 reasons we orbit satellites to observe universe
Globular Cluster
great dark spots
13. Long - meandering cliff formed when a planet surface cools and shrinks
scarp
Planck time
CMB
Cassini division
14. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years
Eyepiece Lens
Milky way Galaxy
Horizontal Branch Star
Red Giant
15. The surface of the sun
shape and color of SPIRAL galaxies
Photosphere
superclusters
dark matter
16. Matter so dense that even light cannot escape its gravity
Black Hole
Celestial Sphere
Sa spiral galaxy
Planck time
17. Mercury and venus
Grand design spirals
Neutron Star
fewest moons
Grand design spirals
18. Very center of galaxy. suggestion of a black hole
nucleus
HII Region
Poor Cluster
Kuiper belt
19. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
Reflector
Sc spiral galaxy
Coronal Loop
20. The shadow behind the Earth or Moon where the Sun is partially obscured.
Halo
Ammonia - methane - and water
Penumbra
cosmic singularity
21. A small round distribution of gas surrounding a dying star
Hydrostatic Equilibrium
Radio Galaxy
Cassini division
Planetary Nebula
22. The relation that tells how light dims with distance.
Inverse Square Law
Cassini division
radiant
supermassive black hole
23. A distance measure determined by the shifting of a star against the background sky every 6 months.
Parsec
synchrotron radiation
Enke gap
Gravity only pulls matter back together. Therefore - if gravity is the only force that operates on cosmic scales then the expansion of the universe should decrease with time. The critical density is the value of matter density sufficient to halt the
24. Neptune or uranus
semimajor axis
Coldest surface
shape and color of ELLIPTICAL galaxies
rotation curve = dark matter?
25. The distance light travels in one year (=9.46x10^12km).
Resolving Power
condensation temperature
Light-Year
rotation curve=winding dilemma?
26. The amount an image is enlarged by a telescope
E=mc2
Io (jupiters moon)
Emission Spectrum
Magnification
27. The movement of the Earth's crustal plates riding on top of the mantle.
Corona
meteor shower
plate tectonics
Bok Globule
28. Loops that trace the magnetic field as it erupts from a sunspot area and arches over to an adjacent area. They glow in the light of gas pouring out of corona and falling into photosphere.
Pulsar
Coronal Loop
CMB
reflection star clusters
29. When the Sun moves from south to north across the celestial equator (about March 21)
Vernal Equinox
Blackbody
Sidereal Day
open star clusters
30. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.
zone
radio galaxy
Flat - Flat
Coronal Loop
31. A perfect absorber and radiator of electromagnetic radiation.
Blackbody
planetesimal
nova
Gravity only pulls matter back together. Therefore - if gravity is the only force that operates on cosmic scales then the expansion of the universe should decrease with time. The critical density is the value of matter density sufficient to halt the
32. The point in its orbit where a planet is nearest the sun
Drake equation
coma
Perihelion
most eccentric orbit
33. Matter that reveals itself only through its gravitational attraction.
accretion
standard candle
Lagrangian Razor
dark matter
34. IO
MOONS: most geologically active
Parsec
tectonics of Venus
Seyfert galaxy
35. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.
regolith
E=mc2
epicycle
Jupiters red spot
36. A planet that is farther from the sun than the Earth is
Superior planets
Population 1 vs Population 2 stars
Doppler Shift
Sidereal Day
37. A star fusing hydrogen to helium in it's core
Particle Horizon
Thickest atmosphere
Perihelion
Main Sequence Stars
38. The law that predicts the possible types of spectra.
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39. A term referring to Jupiter-like planets
semimajor axis
Secondary Mirror
Total Eclipse
jovian
40. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR
supernova
Light Pollution
Light: travels like a wave - detected like a particle
Planetary Nebula
41. The lens that gathers the light in a refractor
MOONS: largest size
White Dwarf
Rich vs poor clusters
Objective Lens
42. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu
reflection star clusters
slowest rotation
Degeneracy
Cepheid variables
43. All possible types of energy that can be emitted and absorbed by atoms.
Meridian
epicycle
Focal Plane
Electromagnetic Radiation
44. 10 cm -> 1 mm
nucleus
Magnification
Electromagnetic Radiation: Microwave
Extrasolar Planet
45. Matter so dense that even light cannot escape its gravity
Hyashi track
Black Hole
Density Wave
Gamma-ray Burst
46. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter
neutrino
Autumnal Equinox
Perihelion
Annular Eclipse
47. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.
High and low pressure which stretch into bands due to the rapid differential rotation. deeper - darker colors are in the belts and zones are lighter
Drake equation
contrast northern lowlands and the southern highlands of mars...
Photon
48. Light-colored high-pressure bands in Jupiter's atmosphere
The Local Group
zone
Cosmic Microwave Background (CMB)
dark energy
49. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)
Ammonia - methane - and water
Filament
Refractor
planetary nebula
50. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t
hottest surface
Autumnal Equinox
Spectroscopic parallax
thinnest atmosphere