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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 amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc
radiation pressure
open star clusters
hottest surface
critical density
2. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)
Radio Galaxy
radiation dominated universe
Photometry
accretion disk
3. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder
cosmic singularity
Cosmological Principle
shape and color of ELLIPTICAL galaxies
Celestial Equator
4. A very dense - highly populated cluster of galaxies
Rich Cluster
Primary Mirror
Corona
SETI
5. Distribution of dust (tells us disk is thin) - find distances to O&B stars and H2 regions (arms are sights of star formation and OB stars live and die at location of birth) -Milky way has four arms. Sun is in spur apart from arms.
mapping the structure of Milky Way disk
Gamma ray bursts
Milky way Galaxy
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
6. The projection of the Earth's equator onto the celestial sphere.
Celestial Equator
gravity
Globular Cluster
Supercluster
7. Large nebula consisting of very cold gas and dust
jovian
Interstellar Extinction
meteorite
Molecular Clouds
8. When massive objects bend space and time enough to create multiple images of an object located behind them
Kuiper belt
Gravitational Lens
direct motion
The Big Bang Theory resolves Olber's Paradox
9. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting
Ganymede (Jupiter)
tectonics of Venus
Chromosphere
Big Crunch
10. The larger bodies that formed early in teh solar nebula that were chemically differentiated
300000 KM/sec
thinnest atmosphere
chondrite
planetesimal
11. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.
molecular clouds
thinnest atmosphere
Flocculent spirals
Pulsar
12. 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.
Corona
Chromosphere
MOONS: thickest atmosphere
contrast northern lowlands and the southern highlands of mars...
13. Europa
Europa (Jupiters moon)
MOONS: roundest shape
Shepherd satellite
Roundest orbit
14. When the Moon entirely blocks the Sun.
cosmology
Reflector
Oort Cloud
Total Eclipse
15. When the Sun is farthest north of the celestial equator (about June 22)
Electromagnetic Radiation: Visible Light
Summer Solstice
great red spot
Ground State
16. 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
Flat - Flat
Reflector
Kuiper belt
quasar
17. Matter that reveals itself only through its gravitational attraction.
Dwarf planets
Color Index
radio lobe
dark matter
18. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.
White Dwarf
Objective Lens
resonance
Black Hole
19. A star that blows itself apart
Yes - frozen at the poles- remains protected from the suns rays
resonance
Degeneracy
Supernova (You can be my supernova girl)
20. Ganymede and Titan
supernova
MOONS: larger than mercury
Main Sequence Stars
Nova
21. Mercury
open star clusters
planetesimal
smallest diameter
Big Crunch
22. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.
general star population
Geocentric
mare basalt
difference between maria and highlands of the moon.
23. Titan
MOONS: thickest atmosphere
Hubble constant
superclusters
CMB
24. Venus
Hydrostatic Equilibrium
jovian
Absolute Magnitude
hottest surface
25. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:
Rich Cluster
Cosmic Microwave Background
Drake equation
Parallax
26. 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 _____.
Metals
Flat - Remain Parallel - Exactly 1
Heliocentric
Largest diameter
27. The act of removing an electron from an atom.
Population 1 vs Population 2 stars
Ionization
Wein's Law
Disk
28. A word meaning 'the same everywhere throughout.'
Superior planets
Synodic Day
greehouse effects
homogeneous
29. A massive variable star used to find distances to the galaxies or clusters that contain them.
anorthosite
Reflector
Supercluster
Cepheid Variable
30. An object that may remain after a star explodes
accretion disk
Neutron Star
Perihelion
CMB
31. The mix of pure photon energy that emerged at the start of the universe.
cosmic fireball
MOONS: most geologically active
Thermonuclear Fusion
Magnification
32. Form honeycomb like patterns surrounding empty or nearly empty voids.
superclusters
Big Bang
terrestrial planet
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
33. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)
cosmological principle
Differential Rotation
Coronal Loop
Shepherd satellite
34. A point in the sky where meteors appear to come from during a shower
radiant
Cassini division
cosmological principle
Kuiper belt
35. The oldest grouping of stars - found in the galaxy halo
CCD
meteoriod
Globular Cluster
opposition
36. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.
radiation dominated universe
synchronous rotation
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
Total Eclipse
37. The elementary building blocks from which protons and neutrons are formed.
conjunction
least dense
Wein's Law
quarks
38. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)
Electromagnetic Radiation: Visible Light
Light Gathering Power
blazar
Kuiper belt
39. 1 mm 1μm
terrestrial planet
rotation curve=winding dilemma?
Electromagnetic Radiation: Infrared
Electromagnetic Radiation: Visible Light
40. In what chemical form are jupiters nitrogen - carbon and oxygen?
Ammonia - methane - and water
Red Giant Branch Star
Neutron Star
Self-Propogating Star Formation
41. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)
Electromagnetic Radiation: Ultraviolet Light
Sunspots
Io (jupiters moon)
quasar
42. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)
radiation dominated universe
acceleration
Pulsar
Stephen-Boltzman Law
43. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.
Planck time
fusion crust
quasar
SETI
44. The dark - relativley smooth areas on the moon; Latin for sea
Sa spiral galaxy
Maria
Cosmic Microwave Background (CMB)
Sunspots
45. A phenomenon seen when the Earth passes through the orbit of a burned out comet
Gravitational Lens
meteor shower
planetary nebula
great dark spots
46. A measure of the ability of a telescope to see fine detail
Dwarf planets
Resolving Power
We don't know. It might be but does not have to be.
Roundest orbit
47. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere
Grand design spirals
Cosmological Principle
Granules
Active Optics
48. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)
bulge
rotation curve=winding dilemma?
Population 1 vs Population 2 stars
regolith
49. The displacement of spectral lines to redder colors caused by the expansion of the universe.
cosmological red shift
Light Gathering Power
Electromagnetic Radiation: Infrared
Electromagnetic Radiation: Gamma Ray
50. A subatomic particle with a negative charge. It creates light.
Negative - Diverge - Less than 1
Oort cloud
Electron
Thickest atmosphere