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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 star that blows itself apart
Supernova (You can be my supernova girl)
Red Giant
Oort cloud
Particle Horizon
2. The gap etween saturn's A and B rings
Degeneracy
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.
Cassini division
hottest surface
3. The name for the only seriously considered theory of the universe.
nova
Filament
Big Bang
density waves
4. A phenomenon seen when the Earth passes through the orbit of a burned out comet
Ecliptic
Colestial Pole
meteor shower
Turn off Point
5. A change in the appearance of the sun at the edge of the solar disk
meteor
Limb darkening
supermassive black hole
Colestial Pole
6. Milky way galaxy is a member - a small poor cluster-about 30 galaxies
The Local Group
dark matter
Superior planets
Electromagnetic Radiation: X-Ray
7. A bridge of material held in position above the solar surface. They can remain for hours even days
MOONS: largest size
Open Cluster
Prominence
Kirkwood gaps
8. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.
synchrotron radiation
3 reasons we orbit satellites to observe universe
Make up of the jovian planets
cosmology
9. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto
Atomic Number
CCD
Colestial Pole
Kuiper belt
10. Venus
Atomic Number
Roundest orbit
density parameter
Electromagnetic Radiation: X-Ray
11. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder
planetary nebula
Ionization
Kuiper belt
shape and color of ELLIPTICAL galaxies
12. 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)
scarp
quasar
Enke gap
roche limit
13. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.
Electromagnetic Radiation: X-Ray
Eclipses of the Moons of Jupiter
epicycle
quasar
14. Infinitely long -> 10 cm
Enke gap
Quasar
Thickest atmosphere
Electromagnetic Radiation: Radio
15. Infinitely long -> 10 cm
Magnification
Kuiper belt
Electromagnetic Radiation: Radio
Biologicla life created the recycling of nitrogen - co2 - and the production of oxygen. Oxygen is heavier so the atmosphere held onto it easier than hydrogen and helium.
16. The entity from which the whole universe is postulated to have come from.
H-are Diagram
Focal Plane
greehouse effects
cosmic singularity
17. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)
isotropic
MOONS: most geologically active
dark energy
H2 Regions
18. Radiation given off by electrons accelerating in a magnetic field
Synchrotron Rotation
density parameter
Perihelion
planetesimal
19. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula
Cosmic Microwave Background (CMB)
Eclipses of the Moons of Jupiter
reflection star clusters
jovian
20. The dark - relativley smooth areas on the moon; Latin for sea
Milky way Galaxy
Supercluster
Maria
Observations of distant type Ia supernovae indicate that the expansion of the universe is speeding up with time - not slowing down! So there must be a force causing this.
21. Very center of galaxy. suggestion of a black hole
Positive - Converge - Greater than 1
Continuous Spectrum
nucleus
Electromagnetic Radiation: Gamma Ray
22. First accurately measured the speed of light in a vacuum
Population 1 vs Population 2 stars
Ole Roemer
rotation curve=winding dilemma?
Nebula
23. The 'edge' of the universe. Light beyond this has not reached us yet.
Hyashi track
partile horizon
Parsec
Superior planets
24. An empirical scheme for predictin ghe orbital distances of planets
Focal Length
Granules
Titus-Bode Law
Plank's Law
25. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)
rotation curve = dark matter?
force
Light-Year
greatest elongation
26. Is space infinitely large?
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27. A term referring to Earth-like planets
How is winding dilemma solved?
Vernal Equinox
terrestrial planet
Halo
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.
mapping the structure of Milky Way disk
Prominence
Coronal Loop
contrast northern lowlands and the southern highlands of mars...
29. A fusion process in which protons build together to form helium
solar nebula
Doppler Shift
Largest diameter
Proton-proton chain
30. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape
Light-Year
bulge
density waves
Largest diameter
31. Ganymede
Self-Propogating Star Formation
MOONS: largest size
SETI
Dark matter candidates
32. The point in its orbit where a planet is nearest the sun
Cosmological Principle
Light-Year
Horizontal Branch Star
Perihelion
33. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes
radio galaxy
Thermal Equilibrium
least dense
Hubble law
34. A word used in astronomy to describe all elements besides hydrogen and helium
Metals
acceleration
Ground State
Sunspot cycle
35. 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.
Spectroscopy
asteroid
Reflector
open star clusters
36. Venus (retrograde)
Doppler Shift
Spectral Lines
Liquid metallic hydrogen
slowest rotation
37. A star that is in the process of forming. It glows from gravitational contraction
mass
protostar
Neutron Star
Apollo asteroids
38. A rock or iron specimen that has fallen from space
H2 Regions
meteorite
Filament
radiant
39. When the Sun moves from south to north across the celestial equator (about March 21)
isotropic
Vernal Equinox
thinnest atmosphere
tectonics of Mars
40. A perfect absorber and radiator of electromagnetic radiation.
self-propagating star formation
gravity
Blackbody
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
41. A term referring to Earth-like planets
Positive - Converge - Greater than 1
terrestrial planet
rotation curve = dark matter?
Void
42. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.
cosmic singularity
Europa (Jupiters moon)
meteor
Halo
43. A star that blows itself apart
Dark Nebula
Autumnal Equinox
Supernova (You can be my supernova girl)
Dark Matter
44. A small chunk of rock in space
Disk
Limb darkening
meteoriod
MOONS: largest size
45. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation
disk
terrestrial planet
Instability strip
rotation curve=winding dilemma?
46. The high- temperatature outer layer of the sun
OB Associations
Chromosphere
Drake equation
Corona
47. The apparent path of the Sun through the stars on the celestial sphere.
Seeing
Penumbra
Granules
Ecliptic
48. The force of attraction between any two objects having mass
Hipparchus
gravity
Color Index
Cepheid variables
49. Matter that reveals itself only through its gravitational attraction
Dark Matter
Absorption Spectrum
meteor
Main Sequence Stars
50. A continuous spectrum of light missing energy at a few wave lengths.
least dense
Thermal Equilibrium
comet
Absorption Spectrum