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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. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.
self-propagating star formation
density parameter
Geocentric
Grand design spirals
2. The slow wobble of the Earth on its rotation axis.
difference between maria and highlands of the moon.
We don't know. It might be but does not have to be.
Focal Plane
Precession
3. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites
Gravity only pulls matter back together. Therefore - if gravity is the only force that operates on cosmic scales then the expansion of the universe should decrease with time. The critical density is the value of matter density sufficient to halt the
Sunspots
Sidereal Day
Dwarf planets
4. The area behind a lens where images are resolved
Absorption Spectrum
Cosmic Microwave Background
Focal Plane
Light-Year
5. Mercury and venus
semimajor axis
fewest moons
Differential Rotation
Prominence
6. 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 ________.
radio lobe
Flat - Flat
Focal Plane
greehouse effects
7. The north-south line passing directly overhead through the zenith.
Meridian
Make up of the terrestrial planets
Rich Cluster
Cassegrain Focus
8. 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.
Milky way Galaxy
quasar
Electromagnetic Radiation: Visible Light
Oort Cloud
9. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density
terrestrial planet
Big Crunch
density parameter
Cosmic Microwave Background (CMB)
10. VENUS
weight
Light Gathering Power
nova
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
11. The part of the Milky way that has on-going star formation
Ole Roemer
Spectroscopic Parallax
Disk
CNO Cycle
12. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.
Dwarf planets
Black Hole
Olber's paradox
Neutron Star
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
reflection star clusters
tectonics of Earth
Autumnal Equinox
14. Collections of young - hot stars
meteor
OB Associations
Ground State
Energy Level
15. When a planet lines up with the sun inthe sky
conjunction
MOONS: most geologically active
Main Sequence Stars
isotropic
16. Dark areas on the sun that are cooler than the surrounding photosphere
Sunspots
least dense
tectonics of Earth
Horizontal Branch Star
17. The light produced when particles from the sun collide with atmospheric molecules
aurora
cosmic singularity
How is winding dilemma solved?
tectonics of Venus
18. Why do Galaxies move very rapidly in the interiors of the dense clusters?
general star population
Seeing
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
Celestial Equator
19. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)
Largest diameter
rotation curve=winding dilemma?
isotropic
quarks
20. That which is responsible for Jupiter's magnetic field
Most dense
Liquid metallic hydrogen
blazar
Hydrostatic Equilibrium
21. Mercury
superclusters
smallest diameter
density parameter
Planck time
22. 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
The Big Bang Theory resolves Olber's Paradox
Apparent Magnitude
Dark Matter
bulge
23. The sinking of denser elements to the center of a young molten planet
molecular clouds
Parallax
chemical differentiation
Continuous Spectrum
24. A star without enough mass to begin hydrogen fusion
standard candle
Brown dwarf
Energy Level
Apollo asteroids
25. The movement of the Earth's crustal plates riding on top of the mantle.
Celestial Equator
Europa (Jupiters moon)
plate tectonics
Electromagnetic Radiation: Microwave
26. Dark areas on the sun that are cooler than the surrounding photosphere
Sunspots
direct motion
jovian
Thickest atmosphere
27. The crust of a meteorite caused by its entry into Earth's atmosphere
fusion crust
Zenith
Electromagnetic Radiation
smallest diameter
28. The distance between a lens and its focal plane
Corona
Focal Length
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
greatest elongation
29. A faint - remarkably uniform distribution of radiation in space
Make up of the jovian planets
Cosmic Microwave Background
Pulsar
protostar
30. An energetic event taking place in the early universe
Gamma-ray Burst
Yes - frozen at the poles- remains protected from the suns rays
isotropic
greatest elongation
31. A spinning neutron star
Triple Alpha rocess
rotation curve = dark matter?
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
Pulsar
32. A representation of the changes in color and brightness of an evolving protostar.
Make up of the jovian planets
Hyashi track
Perihelion
Active Optics
33. 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
Big Crunch
Meridian
White Dwarf
34. 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
bulge
supernova
Gravity only pulls matter back together. Therefore - if gravity is the only force that operates on cosmic scales then the expansion of the universe should decrease with time. The critical density is the value of matter density sufficient to halt the
fusion crust
35. Venus
hottest surface
homogeneous
solar nebula
weight
36. The apparent backward motion of a planet against the background of stars.
Energy Level
retrograde motion
Primary Mirror
300000 KM/sec
37. A plot of star absolute magnitude verses spectral type.
Flocculent spirals
Neutron Star
least dense
H-are Diagram
38. An evolved star - past the helium flash that is burning helium to carbon in it's cores
Light Curve
Horizontal Branch Star
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.
Metals
39. The material from which the solar system formed
bulge
solar nebula
Seeing
MOONS: largest size
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)
asteroid
radiant
matter dominated universe
Heliocentric
41. A rock or iron specimen that has fallen from space
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
highlands
meteorite
Dark Matter
42. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant
meteor
Planck time
cosmology
Thermal Equilibrium
43. An energetic event taking place in the early universe
Gamma-ray Burst
Cepheid variables
zone
Sb spiral galaxy
44. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE
Drake equation
Oort Cloud
Poor Cluster
Callisto (Jupiter)
45. What do we think the actual fate of the universe will be and why do we think this?
Interstellar Extinction
Spectroscopy
Jovian Planets
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.
46. Any class of objects with a uniform luminosity used to determine distance.
standard candle
Liquid metallic hydrogen
disk
Io (jupiters moon)
47. Ganymede and Titan
Electromagnetic Radiation
Corona
MOONS: larger than mercury
Ole Roemer
48. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.
Apparent Magnitude
Main Sequence
semimajor axis
Vernal Equinox
49. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.
Halo
bulge
greatest elongation
Bulge
50. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.
Negative - Diverge - Less than 1
Umbra
Instability strip
Hubble law