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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 mass of an object divided by its volume
3 reasons we orbit satellites to observe universe
shape and color of ELLIPTICAL galaxies
density
blazar
2. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?
hottest surface
If it is in a denser medium - such as glass - it will move slower
Spectroscopic Parallax
SETI
3. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this
Blackbody
supernova
Kuiper belt
terrestrial planet
4. A small chunk of rock in space
Occam's razor
Precession
meteoriod
Population 1 vs Population 2 stars
5. The gap inthe outer portion of Saturn's A ring
Void
Enke gap
Hubble constant
Thermal Equilibrium
6. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years
reflection star clusters
Chromosphere
Milky way Galaxy
Light Gathering Power
7. A force exerted by reflecting sunlight
Planetary Nebula
radiation pressure
cosmic fireball
Dark matter candidates
8. First accurately measured the speed of light in a vacuum
Celestial Equator
Bulge
CNO Cycle
Ole Roemer
9. Clouds of low density gas often found glowing faintly on either side of an AGN.
Radio Galaxy
Perihelion
Black Hole
radio lobe
10. The mirror that determines the focus configuration of a reflector
Stephen-Boltzman Law
Secondary Mirror
High Velocity Stars
Proton-proton chain
11. The wavelengths where a specific element can absorb or emit light.
supermassive black hole
Jovian Planets
Color Index
Spectral Lines
12. The average distance between the Earth and the Sun (=1.5 x10^8km)
Astronomical Unit
Reflector
meteoriod
radiation pressure
13. 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.
Plank's Law
Particle Horizon
H2 Regions
Enke gap
14. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.
Occam's razor
Neutron Star
evidence of water on mars
cosmology
15. Light scattered through the atmosphere that degrades astronomical images
Spectroscopic Parallax
Synchrotron Rotation
Light Pollution
Milky way Galaxy
16. A particle of light.
Photon
Precession
Apparent Magnitude
Density Wave
17. The most mass a white dwarf can have before collapsing to a neutron star
Dark matter candidates
supermassive black hole
Quasar
Chandrasekhar Limit
18. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE
quarks
synchronous rotation
Metals
Io (jupiters moon)
19. Elliptical orbits that come inside orbit of the Earth.
Red Giant Branch Star
Apollo asteroids
CMB
Dark Nebula
20. The high- temperatature outer layer of the sun
dark energy
roche limit
Corona
hottest surface
21. The displacement of spectral lines to redder colors caused by the expansion of the universe.
neutrino
cosmological red shift
Hubble law
Bok Globule
22. The area behind a lens where images are resolved
tectonics of Mars
Positive - Converge - Greater than 1
Focal Plane
Prominence
23. The larger bodies that formed early in teh solar nebula that were chemically differentiated
Positive - Converge - Greater than 1
Focal Plane
planetesimal
tectonics of Mars
24. A term referring to the orbital character of stars near the Sun
Flocculent spirals
semimajor axis
Differential Rotation
Quasar
25. The study of the universe as a whole.
Colestial Pole
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
cosmology
Callisto (Jupiter)
26. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.
Most dense
Steady State Theory (Leads to Olber's Paradox)
cosmic fireball
Main Sequence
27. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant
blazar
Molecular Clouds
AGN
Thermal Equilibrium
28. A small round distribution of gas surrounding a dying star
Planetary Nebula
tectonics of Mars
condensation temperature
anorthosite
29. A spinning neutron star
differential rotation
condensation temperature
Pulsar
Triple Alpha rocess
30. The distance between a lens and its focal plane
A family of radiant energy- includes light
Focal Length
Triple Alpha rocess
Titus-Bode Law
31. Matter so dense that even light cannot escape its gravity
E=mc2
Total Eclipse
Black Hole
Kuiper belt
32. The family of radiant energy that includes light as a subset
Electromagnetic Radiation
Make up of the jovian planets
most eccentric orbit
Spectral Lines
33. The distance a moon can be from a planet before shattering from tidal forces
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.
Ground State
Nebula
roche limit
34. Approximate speed of light in a vacuum
dark energy
Supercluster
300000 KM/sec
Refractor
35. The amount an image is enlarged by a telescope
Magnification
Superior planets
Rich Cluster
Maria
36. The Greek philosopher responsible for making the stellar magnitude scale.
Halo
Olber's paradox
Hubble constant
Hipparchus
37. A plot of star absolute magnitude verses spectral type.
bulge
H-are Diagram
general star population
Open Cluster
38. The normal eastward movement of a planet against the background of hte distant stars.
Radiative Diffusion
Nowhere visible to us. If there are higher dimension then the center would be visible to someone who lives in one. If there are no higher dimensions then the center does not exist.
direct motion
Electromagnetic Radiation: Infrared
39. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)
Oort cloud
Nucleus
Autumnal Equinox
cosmological principle
40. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
critical density
direct motion
Rich vs poor clusters
Positive - Converge - Greater than 1
41. A bridge of material held in position above the solar surface. They can remain for hours even days
Reflector
Prominence
bulge
smallest diameter
42. Ganymede
MOONS: largest size
Granules
gravity
Objective Lens
43. The relation that tells how light dims with distance.
Hipparchus
Perihelion
Nebula
Inverse Square Law
44. 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 ________.
Flat - Flat
Flat - Remain Parallel - Exactly 1
accretion
Spectroscopic parallax
45. The number of protons in an atom.
force
Atomic Number
HII Region
Apollo asteroids
46. Mercury
Sunspots
Black Hole
Synchrotron Rotation
most eccentric orbit
47. 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.
Supercluster
Neutron Star
accretion disk
mapping the structure of Milky Way disk
48. The apparent magnitude a star would have if it were at a distance of 10 parsecs.
Sunspot cycle
Positive - Converge - Greater than 1
Molecular Clouds
Absolute Magnitude
49. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.
reflection star clusters
AGN
Sunspot cycle
Ammonia - methane - and water
50. Jupiter
Largest diameter
shape and color of SPIRAL galaxies
Particle Horizon
Molecular Clouds