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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. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation
Main Sequence
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Brown dwarf
AGN
2. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)
Plank's Law
Kuiper belt
Oort Cloud
rotation curve=winding dilemma?
3. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.
Occam's razor
Resolving Power
Gamma ray bursts
Lagrangian Razor
4. A term referring to the orbital character of stars near the Sun
Electromagnetic Radiation
Differential Rotation
Focal Length
Kuiper belt
5. Is there water on the moon?
partile horizon
Yes - frozen at the poles- remains protected from the suns rays
Corona
Rich Cluster
6. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)
AGN
Halo
most moons
general star population
7. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)
Dark Matter
Oort cloud
meteor shower
Asymptotic giant Branch Star
8. Ganymede
MOONS: largest size
Lagrangian Razor
Degeneracy
Sc spiral galaxy
9. The process responsible for creating the arms of flocculent spiral galaxies
Self-Propogating Star Formation
era of recombination
Precession
weight
10. An empirical scheme for predictin ghe orbital distances of planets
Emission Spectrum
Hubble constant
Oort Cloud
Titus-Bode Law
11. The cosmological principle is the assumption that the universe is isotropic and homogeneous.The Big Bang assumes it to be a correct principle so that what we observe is exactly like What is too far away to be observed.
zone
Cosmological Principle
Focal Length
Zenith
12. Possible Fates of the Universe
cosmic singularity
Focal Plane
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
anorthosite
13. The law stating that hotter blackbodies look bluer than cooler blackbodies.
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14. A telescope that uses mirrors to focus light
evidence of water on mars
Main Sequence
Reflector
Celestial Equator
15. Orbit in Jupiters orbit
Apparent Magnitude
Trojan asteroids
Stephen-Boltzman Law
direct motion
16. The slow wobble of the Earth on its rotation axis.
MOONS: largest size
Main Sequence Stars
Precession
The Big Bang Theory
17. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals
asteroid
radio galaxy
The Local Group
Apollo asteroids
18. A distance measure determined by the shifting of a star against the background sky every 6 months.
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
Rich vs poor clusters
Sunspot cycle
Parsec
19. 10^2 nm 10^7 nm
Spectroscopic parallax
Heliocentric
Electromagnetic Radiation: Gamma Ray
Jovian Planets
20. A particle of light.
Void
highlands
weight
Photon
21. Very center of galaxy. suggestion of a black hole
nucleus
Globular Cluster
Galilean satellite
protostar
22. A volume of space where few - if any - galaxies are located
chemical differentiation
Void
Particle Horizon
Gamma-ray Burst
23. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.
Black Hole
MOONS: thickest atmosphere
MOONS: thickest atmosphere
open star clusters
24. The lowest energy of an atom.
great red spot
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
Particle Horizon
Ground State
25. A long-lived high-pressure bulge in Jupiter's southern hemisphere
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
Annular Eclipse
great red spot
mass
26. Is space infinitely large?
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27. Long - meandering cliff formed when a planet surface cools and shrinks
Inverse Square Law
Light-Year
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
scarp
28. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this
Hubble constant
MOONS: larger than mercury
Kuiper belt
Corona
29. Jupiter - Saturn - Uranus - Neptune
thinnest atmosphere
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
Color Index
Jovian Planets
30. A star that blows itself apart
Extrasolar Planet
Supernova (You can be my supernova girl)
Self-Propogating Star Formation
Ammonia - methane - and water
31. The amount an image is enlarged by a telescope
Magnification
terrestrial planet
Poor Cluster
differential rotation
32. A collection of galaxies like the one the Milky Way belongs to
Parsec
Poor Cluster
Pulsar
Gamma ray bursts
33. A point in the sky where meteors appear to come from during a shower
radiant
Big Crunch
density waves
Roundest orbit
34. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)
Sunspots
Focal Length
How is winding dilemma solved?
Cassini division
35. Material that shoots rapidly out into space. Flares cause Auroras
conjunction
homogeneous
Flare
mapping the structure of Milky Way disk
36. The science of measuring the apparent magnitudes of stars by imaging them through different filters.
Apollo asteroids
Photometry
Flat - Flat
Dark Matter
37. 100 nm 10 nm
Electromagnetic Radiation: Ultraviolet Light
meteoriod
Hydrostatic Equilibrium
Quasar
38. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.
Spectral Lines
Neutron Star
Sunspot cycle
Red Giant Branch Star
39. The larger bodies that formed early in teh solar nebula that were chemically differentiated
Cassegrain Focus
planetesimal
Sa spiral galaxy
Celestial Equator
40. Titan
widmanstatten pattern
MOONS: thickest atmosphere
Heliocentric
Lagrangian Razor
41. Hot cells of gas that rise and fall in the hotosphere
direct motion
differential rotation
general star population
Granules
42. A rock or iron specimen that has fallen from space
meteorite
Zenith
roche limit
Photon
43. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this
Kuiper belt
MOONS: largest size
Annular Eclipse
meteor
44. The fusion process that turns three helium nuclei into a carbon nucleus
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Triple Alpha rocess
The Big Bang Theory
supermassive black hole
45. A small spherical dark nebula
cosmological red shift
Bok Globule
zone
Electromagnetic Radiation: X-Ray
46. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy
Celestial Sphere
synchrotron radiation
Colestial Pole
Sb spiral galaxy
47. When the Sun moves from south to north across the celestial equator (about March 21)
Vernal Equinox
Maria
acceleration
Planetary Nebula
48. A perfect absorber and radiator of electromagnetic radiation.
Granules
Electromagnetic Radiation
Blackbody
Hydrostatic Equilibrium
49. Small moons that maintain the shape of rings around Saturn and Uranus
Refractor
In an expanding universe all galaxies see all other galaxies that are not gravitationally bound to them receding away. This is what we see in the Hubble Law. We infer that the Hubble law also holds true for all other galaxies.
greehouse effects
Shepherd satellite
50. The point in its orbit where a planet is nearest the sun
Proton-proton chain
Red Giant
Perihelion
Nowhere visible to us. If there are higher dimension then the center would be visible to someone who lives in one. If there are no higher dimensions then the center does not exist.