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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. 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 _____.
fastest rotation
comet
Flat - Remain Parallel - Exactly 1
Spectroscopy
2. The first rock-sized bodies that formed in the solar nebula from dust grains
Cosmic Microwave Background
chondrite
Granules
Hubble constant
3. The shadow area behind the Earth or Moon where the Sun is completely obscured.
Ionization
Sunspot cycle
Umbra
condensation temperature
4. When the Sun is farthest south of the celestial equator (About December 22)
Electromagnetic Radiation: Ultraviolet Light
SETI
Winter Solstice
Color Index
5. Mercury
smallest diameter
Cassini division
Sb spiral galaxy
Magnification
6. 100 nm 10 nm
radiation pressure
Light Gathering Power
Electromagnetic Radiation: Ultraviolet Light
Oort cloud
7. Venus (retrograde)
Galilean satellite
Ammonia - methane - and water
Light Curve
slowest rotation
8. What is the universe expanding into?
It does not have to expand into anything. It might just be that the 3 dimensions of space are getting bigger. It may also be that our 3 spatial dimensions are expanding into higher dimensions if such things exist.
Absolute Magnitude
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
Penumbra
9. The slow wobble of the Earth on its rotation axis.
shape and color of ELLIPTICAL galaxies
Precession
cosmological principle
Occam's razor
10. The mass of an object divided by its volume
gravity
chondrite
density
Dark Matter
11. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies
Europa (Jupiters moon)
Nebula
Ground State
Parallax
12. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.
hottest surface
Nova
Oort cloud
Hydrostatic Equilibrium
13. The process similar to conduction by which energy moves from the solar core to the convective layer
Radiative Diffusion
Sidereal Day
Main Sequence
Lagrangian Razor
14. Radiation given off by electrons accelerating in a magnetic field
Thermal Equilibrium
Synchrotron Rotation
Focal Plane
radiant
15. A measure of the ability of a telescope to see fine detail
Resolving Power
Meridian
Nova
Main Sequence
16. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density
Ganymede (Jupiter)
density parameter
cosmic fireball
acceleration
17. A planet that is closer to the sun than the earth
Drake equation
inferior planets
cosmological principle
Resolving Power
18. The gap inthe outer portion of Saturn's A ring
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Absorption Spectrum
Flare
Enke gap
19. A continuous spectrum of light missing energy at a few wave lengths.
Vernal Equinox
Refractor
Absorption Spectrum
Objective Lens
20. Mercury - Venus - Earth - Mars
Cassegrain Focus
Terrestrial Planets
Hipparchus
Occam's razor
21. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas
H-are Diagram
Cosmic Microwave Background
Dark Nebula
Oort Cloud
22. An object that may remain after a star explodes
Neutron Star
meteor shower
The Big Bang Theory
Cepheid Variable
23. All possible types of energy that can be emitted and absorbed by atoms.
belt
Electromagnetic Radiation
Continuous Spectrum
Spectroscopic parallax
24. Long - meandering cliff formed when a planet surface cools and shrinks
Ecliptic
scarp
synchrotron radiation
Dwarf planets
25. Mercury
shape and color of SPIRAL galaxies
Colestial Pole
thinnest atmosphere
cosmic fireball
26. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.
Oort Cloud
Celestial Sphere
density
Europa (Jupiters moon)
27. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder
general star population
Limb darkening
shape and color of ELLIPTICAL galaxies
Colestial Pole
28. Why does the earth have few craters while the moon has many?
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Kirchhoff's Law
Meridian
Poor Cluster
29. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth
chemical differentiation
gravity
Brown dwarf
Sa spiral galaxy
30. When massive objects bend space and time enough to create multiple images of an object located behind them
Hyashi track
Gravitational Lens
Enke gap
Seeing
31. Saturn
least dense
Hubble constant
Atomic Number
Particle Horizon
32. All possible types of energy that can be emitted and absorbed by atoms.
Objective Lens
Electromagnetic Radiation
Titus-Bode Law
Sunspot cycle
33. 10^2 nm 10^7 nm
slowest rotation
Europa (Jupiters moon)
Electromagnetic Radiation: Gamma Ray
Gravitational Lens
34. Venus (retrograde)
slowest rotation
Cepheid variables
Kuiper belt
Dwarf planets
35. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.
synchrotron radiation
nova
Light Pollution
Halo
36. Matter that reveals itself only through its gravitational attraction.
Planetary Nebula
synchrotron radiation
SETI
dark matter
37. 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.
Cosmological Principle
evidence of water on mars
Black Hole
Differential Rotation
38. All wavelengths of light emitted by a blackbody.
planetesimal
Absolute Magnitude
Blackbody Curve
Titus-Bode Law
39. The mirror that determines the focus configuration of a reflector
Secondary Mirror
differential rotation
self-propagating star formation
The Big Bang Theory resolves Olber's Paradox
40. 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
Instability strip
Photosphere
disk
meteoriod
41. A continuous spectrum of light missing energy at a few wave lengths.
disk
comet
Absorption Spectrum
differential rotation
42. A faint - remarkably uniform distribution of radiation in space
Dark Matter
Cosmic Microwave Background
HII Region
Radiative Diffusion
43. A point in the sky where meteors appear to come from during a shower
Light Pollution
radiant
widmanstatten pattern
Zenith
44. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.
3 reasons we orbit satellites to observe universe
Photosphere
density waves
tectonics of Venus
45. A particle of light.
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Planck time
Photon
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
46. The entity responsible for spiral arms in grand-design spiral galaxies
disk
SETI
Coldest surface
Density Wave
47. 1μm 100 nm
Superior planets
Electromagnetic Radiation: Visible Light
Celestial Sphere
Gamma-ray Burst
48. Ganymede and Titan
Seeing
Halo
nucleus
MOONS: larger than mercury
49. A repeated - periodic push or pull capable of summing into a larger push or pull
resonance
accretion disk
Cosmic Microwave Background (CMB)
A family of radiant energy- includes light
50. The entity responsible for spiral arms in grand-design spiral galaxies
Photometry
Big Crunch
partile horizon
Density Wave