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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 imaginary sphere centered on the Earth that hols the stars.
Galilean satellite
Ecliptic
Celestial Sphere
Liquid metallic hydrogen
2. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core
Trojan asteroids
Asymptotic giant Branch Star
Magnification
anorthosite
3. The lens in a telescope used to determine the magnification
Geocentric
Eyepiece Lens
Io (jupiters moon)
Brown dwarf
4. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.
isotropic
deferent
self-propagating star formation
Eclipses of the Moons of Jupiter
5. 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.
A family of radiant energy- includes light
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
supernova
H2 Regions
6. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant
Radio Galaxy
Interstellar Extinction
OB Associations
Thermal Equilibrium
7. Infinitely long -> 10 cm
Filament
Electromagnetic Radiation: Radio
Flocculent spirals
Titus-Bode Law
8. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals
Autumnal Equinox
Population 1 vs Population 2 stars
asteroid
standard candle
9. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)
opposition
smallest diameter
general star population
partile horizon
10. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas
meteorite
Make up of the jovian planets
mare basalt
Dark Nebula
11. A particle of light.
Photon
Make up of the terrestrial planets
radio galaxy
Total Eclipse
12. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.
Particle Horizon
Electromagnetic Radiation: Infrared
H-are Diagram
Winter Solstice
13. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy
Black Hole
Spectroscopic parallax
Sc spiral galaxy
Metals
14. A small spherical dark nebula
Electron
Energy Level
Bok Globule
synchrotron radiation
15. The science of measuring the apparent magnitudes of stars by imaging them through different filters.
Photometry
Atomic Number
Rich Cluster
radiation pressure
16. 100 nm 10 nm
MOONS: larger than mercury
Light Gathering Power
Electromagnetic Radiation: Ultraviolet Light
Olber's paradox
17. Elliptical orbits that come inside orbit of the Earth.
Big Bang
Electromagnetic Radiation: Infrared
Disk
Apollo asteroids
18. A particle of light
Active Optics
Limb darkening
Photon
Reflector
19. Centered on the Earth
Geocentric
Radio Galaxy
Eclipses of the Moons of Jupiter
Radiative Diffusion
20. All possible types of energy that can be emitted and absorbed by atoms.
Total Eclipse
Most dense
Focal Length
Electromagnetic Radiation
21. The law that syas light energy from a blackbody increases as (temperature^4)
Corona
Reflector
Ole Roemer
Stephen-Boltzman Law
22. When the Sun moves from south to north across the celestial equator (about March 21)
Vernal Equinox
condensation temperature
Trojan asteroids
coma
23. 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.
Titus-Bode Law
Extrasolar Planet
mapping the structure of Milky Way disk
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
24. The process that powers the sun and hydrogen bombs
thinnest atmosphere
chemical differentiation
Thermonuclear Fusion
supermassive black hole
25. The apparent backward motion of a planet against the background of stars.
Nova
retrograde motion
least dense
Electromagnetic Radiation: Gamma Ray
26. A rock or iron specimen that has fallen from space
Galilean satellite
Seeing
Blackbody Curve
meteorite
27. A high-pressure bulge in Neptune's southern hemisphere
Big Crunch
The Big Bang Theory resolves Olber's Paradox
great dark spots
Sunspot cycle
28. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.
Steady State Theory (Leads to Olber's Paradox)
Main Sequence
chondrite
H2 Regions
29. A small and dim but hot star.
Flat - Flat
Plank's Law
Inverse Square Law
White Dwarf
30. A volume of space where few - if any - galaxies are located
fusion crust
belt
Void
Granules
31. An element of a highly efficient - two-dimensional electronic light detector
Perihelion
Pixel
Cosmological Principle
Celestial Sphere
32. A perfect absorber and radiator of electromagnetic radiation.
Blackbody
critical density
Magnification
radiation pressure
33. A star fusing hydrogen to helium in it's core
Main Sequence Stars
Io (jupiters moon)
Cosmological Principle
mapping the structure of Milky Way disk
34. 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 ________.
Spectroscopy
Flat - Flat
HII Region
Corona
35. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction
MOONS: largest size
critical density
cosmic fireball
interstellar dust
36. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)
Degeneracy
self-propagating star formation
SETI
Color Index
37. All possible types of energy that can be emitted and absorbed by atoms.
Electromagnetic Radiation
quasar
If it is in a denser medium - such as glass - it will move slower
Kirchhoff's Law
38. When a planet lines up with the sun inthe sky
Chandrasekhar Limit
conjunction
evidence of water on mars
belt
39. The wavelengths where a specific element can absorb or emit light.
Galilean satellite
Spectral Lines
Doppler Shift
Filament
40. The layer of the sun just above the photosphere
Gravitational Lens
general star population
terrestrial planet
Chromosphere
41. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie
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42. A term referring to Jupiter-like planets
neutrino
MOONS: largest size
jovian
MOONS: largest size
43. 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
zone
asteroid
Largest diameter
supernova
44. Light-colored high-pressure bands in Jupiter's atmosphere
Disk
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
Self-Propogating Star Formation
zone
45. An entity that is likely in the nucleus of most - if not all - galaxies.
supermassive black hole
reflection star clusters
Red Giant Branch Star
terrestrial planet
46. Venus
Roundest orbit
Big Bang
Objective Lens
Apparent Magnitude
47. The projection of the Earth's equator onto the celestial sphere.
Planck time
Celestial Equator
Disk
density waves
48. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.
era of recombination
epicycle
Objective Lens
density
49. The movement of the Earth's crustal plates riding on top of the mantle.
synchronous rotation
plate tectonics
highlands
solar nebula
50. A star fusing hydrogen to helium in it's core
AGN
meteoriod
cosmology
Main Sequence Stars