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Test your basic knowledge |
Cosmology
Start Test
Study First
Subject
:
science
Instructions:
Answer 50 questions in 15 minutes.
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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 law that syas light energy from a blackbody increases as (temperature^4)
Stephen-Boltzman Law
nova
Light: travels like a wave - detected like a particle
Electron
2. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t
great red spot
Spectroscopic parallax
E=mc2
Supercluster
3. The oldest part of the Milky Way
Winter Solstice
shape and color of SPIRAL galaxies
partile horizon
Halo
4. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE
Ganymede (Jupiter)
interstellar dust
Gravitational Lens
standard candle
5. Any change in the speed or direction of an object's motion
3 reasons we orbit satellites to observe universe
terrestrial planet
acceleration
standard candle
6. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.
Absorption Spectrum
Io (jupiters moon)
Jupiters red spot
Continuous Spectrum
7. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)
Thermal Equilibrium
Sb spiral galaxy
blazar
cosmology
8. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?
If it is in a denser medium - such as glass - it will move slower
Sunspots
protostar
Electromagnetic Radiation: Radio
9. A fusion process in which protons build together to form helium
Quasar
Proton-proton chain
Terrestrial Planets
Electromagnetic Radiation: Infrared
10. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy
The Big Bang Theory resolves Olber's Paradox
Sc spiral galaxy
Electromagnetic Radiation: Infrared
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
11. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE
Hubble constant
Europa (Jupiters moon)
Secondary Mirror
Emission Spectrum
12. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy
Refractor
Sb spiral galaxy
evidence of water on mars
Differential Rotation
13. A method of finding a star's distance from its absolute magnitude and spectral type or color.
Spectroscopic Parallax
cosmology
Planck time
Nucleus
14. Collections of young - hot stars
Focal Length
OB Associations
Convection
retrograde motion
15. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth
hottest surface
tectonics of Earth
Sa spiral galaxy
Oort Cloud
16. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder
Chromosphere
shape and color of ELLIPTICAL galaxies
Electromagnetic Radiation: Gamma Ray
Jovian Planets
17. The high- temperatature outer layer of the sun
Gamma ray bursts
Flat - Flat
Corona
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
18. A perfect absorber and radiator of electromagnetic radiation.
contrast northern lowlands and the southern highlands of mars...
Black Hole
Blackbody
chemical differentiation
19. A small and dim but hot star.
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.
meteor
White Dwarf
OB Associations
20. The entity responsible for spiral arms in grand-design spiral galaxies
Planck time
Grand design spirals
Density Wave
supermassive black hole
21. 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)
Density Wave
quasar
MOONS: larger than mercury
Hubble constant
22. Milky way galaxy is a member - a small poor cluster-about 30 galaxies
The Local Group
Filament
Reflector
Spectroscopic Parallax
23. All wavelengths of light emitted by a blackbody.
Dark Nebula
solar nebula
tectonics of Earth
Blackbody Curve
24. A telescope that uses lenses to focus light
Refractor
Sc spiral galaxy
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.
inferior planets
25. The amount an image is enlarged by a telescope
Magnification
critical density
Eclipses of the Moons of Jupiter
Umbra
26. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.
High Velocity Stars
Jupiters red spot
opposition
tectonics of Earth
27. The oldest terrain on the moon
highlands
Metals
H-are Diagram
Liquid metallic hydrogen
28. A point in the sky where meteors appear to come from during a shower
Extrasolar Planet
Seeing
Liquid metallic hydrogen
radiant
29. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.
MOONS: largest size
radio galaxy
quasar
Europa (Jupiters moon)
30. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.
Prominence
molecular clouds
hottest surface
condensation temperature
31. A telescope that uses lenses to focus light
planetary nebula
Refractor
Void
Shepherd satellite
32. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)
neutrino
MOONS: most geologically active
chondrite
planetary nebula
33. Form honeycomb like patterns surrounding empty or nearly empty voids.
superclusters
Heliocentric
Liquid metallic hydrogen
dark energy
34. A star that erratically and explosively brightens and dims
radiation dominated universe
Nova
scarp
fewest moons
35. All wavelengths of light emitted by a blackbody.
Blackbody Curve
H-are Diagram
How is winding dilemma solved?
Light: travels like a wave - detected like a particle
36. 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
Eyepiece Lens
Electromagnetic Radiation: Visible Light
Spectral Lines
37. The average distance between the Earth and the Sun (=1.5 x10^8km)
Main Sequence Stars
Autumnal Equinox
Gamma ray bursts
Astronomical Unit
38. A force exerted by reflecting sunlight
radiation pressure
Apollo asteroids
Photon
Olber's paradox
39. Mercury
Objective Lens
most eccentric orbit
cosmic singularity
Main Sequence
40. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)
Electron
Geocentric
Oort cloud
superclusters
41. A push or a pull
Thermonuclear Fusion
SETI
Halo
force
42. The organization of clusters of galaxies into sheets and strings
The Big Bang Theory resolves Olber's Paradox
Supercluster
Active Optics
Lagrangian Razor
43. The dimming of starlight by intervening dust
Electromagnetic Radiation
Supernova (You can be my supernova girl)
Interstellar Extinction
Photon
44. The most mass a white dwarf can have before collapsing to a neutron star
Total Eclipse
Chandrasekhar Limit
Kirkwood gaps
synchrotron radiation
45. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.
Oort Cloud
Terrestrial Planets
Extrasolar Planet
density waves
46. When the Sun is farthest north of the celestial equator (about June 22)
neutrino
Summer Solstice
Thickest atmosphere
H2 Regions
47. Then the Sun moves from north to south across the celestial equator (about September 23)
Autumnal Equinox
cosmological red shift
Cassegrain Focus
Convection
48. A location on an H-are Diagram where evolving stars pulsate
Neutron Star
Filament
Absolute Magnitude
Instability strip
49. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.
accretion disk
shape and color of SPIRAL galaxies
Kuiper belt
Cassegrain Focus
50. Light-colored high-pressure bands in Jupiter's atmosphere
Electromagnetic Radiation: Gamma Ray
Red Giant Branch Star
zone
Maria
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