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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. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere
Perihelion
Parallax
Active Optics
neutrino
2. A faint - remarkably uniform distribution of radiation in space
thinnest atmosphere
Cosmic Microwave Background
greatest elongation
Neutron Star
3. 1 mm 1μm
Focal Plane
Electromagnetic Radiation: Infrared
Energy Level
Flocculent spirals
4. The place in the sky that the Earth's axis points toward (can be either north or south)
Colestial Pole
Chromosphere
aurora
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
5. The gap etween saturn's A and B rings
Plague
Cassini division
self-propagating star formation
Red Giant Branch Star
6. The projection of the Earth's equator onto the celestial sphere.
Trojan asteroids
Celestial Equator
Hyashi track
Supercluster
7. The seasonal shifting of a nearby star's position relative to more distant objects.
Halo
Parallax
retrograde motion
scarp
8. The family of radiant energy that includes light as a subset
Primary Mirror
Electromagnetic Radiation
acceleration
Winter Solstice
9. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)
Cosmological Principle
gravity
radio galaxy
Dark matter candidates
10. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction
open star clusters
synchrotron radiation
radio galaxy
interstellar dust
11. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker
accretion
Seyfert galaxy
nucleus
Sb spiral galaxy
12. When particles are compressed to an unnatural state where their pressure is not related to their temperature
Olber's paradox
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
Degeneracy
Roundest orbit
13. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.
Turn off Point
Kirchhoff's Law
widmanstatten pattern
Radio Galaxy
14. A star that is burning hydrogen to helium in a shell surrounding it's core
Proton-proton chain
Red Giant Branch Star
comet
reflection star clusters
15. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy
MOONS: largest size
Kirchhoff's Law
partile horizon
Sc spiral galaxy
16. What causes the zones and belts on jupiter and saturn?
smallest diameter
Geocentric
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
CMB
17. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)
Photosphere
Thickest atmosphere
rotation curve = dark matter?
Perihelion
18. Radiation given off by electrons accelerating in a magnetic field
Synchrotron Rotation
retrograde motion
Zenith
Population 1 vs Population 2 stars
19. Centered on the Earth
nova
Geocentric
Largest diameter
Main Sequence Stars
20. A younger cluster of stars - found in the galaxy disk
Cassegrain Focus
Light Gathering Power
Open Cluster
Electron
21. Orbit in Jupiters orbit
Yes - frozen at the poles- remains protected from the suns rays
Steady State Theory (Leads to Olber's Paradox)
If it is in a denser medium - such as glass - it will move slower
Trojan asteroids
22. A point in the sky where meteors appear to come from during a shower
planetesimal
Pixel
Kuiper belt
radiant
23. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.
Seeing
belt
evidence of water on mars
Hydrostatic Equilibrium
24. A star fusing hydrogen to helium in it's core
Main Sequence Stars
regolith
Terrestrial Planets
Kuiper belt
25. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.
zone
Neutron Star
Secondary Mirror
protostar
26. A star that is burning hydrogen to helium in a shell surrounding it's core
Absolute Magnitude
Red Giant Branch Star
Neutron Star
MOONS: most geologically active
27. The temp at which a substance in the vacuum of space solidifies
condensation temperature
Electromagnetic Radiation: Visible Light
Milky way Galaxy
fewest moons
28. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.
density parameter
differential rotation
Cosmic Microwave Background (CMB)
Black Hole
29. The displacement of spectral lines to redder colors caused by the expansion of the universe.
Convection
cosmological red shift
Terrestrial Planets
retrograde motion
30. Material that shoots rapidly out into space. Flares cause Auroras
Blackbody Curve
Gamma-ray Burst
Flare
Electromagnetic Radiation: Infrared
31. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.
MOONS: thickest atmosphere
Trojan asteroids
molecular clouds
If it is in a denser medium - such as glass - it will move slower
32. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.
Total Eclipse
Black Hole
self-propagating star formation
Coldest surface
33. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)
general star population
Plague
radiation dominated universe
Proton-proton chain
34. The lowest energy of an atom.
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Poor Cluster
Ground State
Ammonia - methane - and water
35. A very dense - highly populated cluster of galaxies
cosmic singularity
Chandrasekhar Limit
Milky way Galaxy
Rich Cluster
36. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.
Total Eclipse
density waves
Sa spiral galaxy
Positive - Converge - Greater than 1
37. The powdered stone fragments that make up the lunar 'soil'
Turn off Point
regolith
accretion
Flat - Flat
38. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy
protostar
Red Giant Branch Star
Stephen-Boltzman Law
Sb spiral galaxy
39. When one side of a body always faces the planet it revolves around
Seeing
direct motion
synchronous rotation
disk
40. The era when the ratio of matter to energy greatly favored matter. (verses radiation dominated universe where it was opaque. Matter is now dominated by gravity not photons)
matter dominated universe
Electromagnetic Radiation: Infrared
Black Hole
Disk
41. The force of attraction between any two objects having mass
gravity
condensation temperature
The Big Bang Theory
supermassive black hole
42. A small and dim but hot star.
White Dwarf
Ecliptic
open star clusters
mapping the structure of Milky Way disk
43. Either Io -Europa - Ganymede - or Callisto
Hydrostatic Equilibrium
Kuiper belt
Cepheid variables
Galilean satellite
44. The telescope configuration that has the focus placed at the back of the primary mirror
MOONS: larger than mercury
cosmology
Steady State Theory (Leads to Olber's Paradox)
Cassegrain Focus
45. A small chunk of rock in space
meteoriod
cosmological red shift
molecular clouds
quasar
46. 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:
Drake equation
Perihelion
How is winding dilemma solved?
Electromagnetic Radiation
47. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.
thinnest atmosphere
Cosmic Microwave Background
Electromagnetic Radiation: Ultraviolet Light
synchrotron radiation
48. The oldest part of the Milky Way
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.
Halo
Jovian Planets
planetary nebula
49. The rock that makes up the lunar highlands
Black Hole
anorthosite
great dark spots
Horizontal Branch Star
50. When the Sun is farthest north of the celestial equator (about June 22)
Positive - Converge - Greater than 1
Summer Solstice
disk
Main Sequence Stars