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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. Venus
Absorption Spectrum
chondrite
hottest surface
cosmic singularity
2. The wavelengths where a specific element can absorb or emit light.
Spectral Lines
Neutron Star
Synodic Day
Liquid metallic hydrogen
3. The place in the sky that the Earth's axis points toward (can be either north or south)
rotation curve=winding dilemma?
Turn off Point
MOONS: roundest shape
Colestial Pole
4. Moon in less than the angular diameter of the Sun.
Big Bang
Annular Eclipse
isotropic
Photometry
5. Milky way galaxy is a member - a small poor cluster-about 30 galaxies
The Local Group
Milky way Galaxy
E=mc2
AGN
6. Form honeycomb like patterns surrounding empty or nearly empty voids.
Apollo asteroids
Light Gathering Power
superclusters
Cosmic Microwave Background
7. Light-colored high-pressure bands in Jupiter's atmosphere
zone
radiation pressure
Neutron Star
Jovian Planets
8. A spectrum of light with energy at only a few wavelengths.
Sb spiral galaxy
Nucleus
Lagrangian Razor
Emission Spectrum
9. A perfect absorber and radiator of electromagnetic radiation.
Blackbody
Hubble constant
AGN
superclusters
10. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy
Dark Matter
Horizontal Branch Star
Sb spiral galaxy
thinnest atmosphere
11. What causes the zones and belts on jupiter and saturn?
3 reasons we orbit satellites to observe universe
retrograde motion
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
tectonics of Earth
12. A star fusing hydrogen to helium in it's core
conjunction
Maria
Main Sequence Stars
density parameter
13. The projection of the Earth's equator onto the celestial sphere.
least dense
Celestial Equator
Absorption Spectrum
regolith
14. A small chunk of rock in space
Emission Spectrum
meteoriod
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.
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.
15. A force exerted by reflecting sunlight
Radio Galaxy
cosmic fireball
radiation pressure
accretion
16. A quantity measuring the stability of the Earth's atmosphere
Seeing
Absorption Spectrum
Hubble constant
Chromosphere
17. The lens that gathers the light in a refractor
Interstellar Extinction
Objective Lens
greehouse effects
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
18. The temp at which a substance in the vacuum of space solidifies
supermassive black hole
density waves
Most dense
condensation temperature
19. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast
Doppler Shift
general star population
Cepheid variables
High Velocity Stars
20. The displacement of spectral lines to redder colors caused by the expansion of the universe.
Perihelion
Light-Year
reflection star clusters
cosmological red shift
21. 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.
Photon
rotation curve=winding dilemma?
Hydrostatic Equilibrium
Ole Roemer
22. Any change in the speed or direction of an object's motion
acceleration
Jovian Planets
Chandrasekhar Limit
MOONS: most geologically active
23. Very center of galaxy. suggestion of a black hole
Oort Cloud
Celestial Sphere
nucleus
asteroid
24. A particle of light.
radiant
Color Index
Autumnal Equinox
Photon
25. First accurately measured the speed of light in a vacuum
Light Pollution
Light: travels like a wave - detected like a particle
Ole Roemer
Ammonia - methane - and water
26. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)
Electromagnetic Radiation: Ultraviolet Light
rotation curve = dark matter?
Resolving Power
Ole Roemer
27. The process responsible for creating the arms of flocculent spiral galaxies
Quasar
Self-Propogating Star Formation
Red Giant
conjunction
28. A star that erratically and explosively brightens and dims
Emission Spectrum
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
Nova
Prominence
29. Why do Galaxies move very rapidly in the interiors of the dense clusters?
Autumnal Equinox
Blackbody
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
Apparent Magnitude
30. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.
self-propagating star formation
meteor
Trojan asteroids
The Big Bang Theory resolves Olber's Paradox
31. A fusion process in which protons build together to form helium
Proton-proton chain
H-are Diagram
blazar
A family of radiant energy- includes light
32. Neptune or uranus
Halo
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
density parameter
Coldest surface
33. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu
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.
Coronal Loop
Cepheid variables
Make up of the terrestrial planets
34. The law that syas light energy from a blackbody increases as (temperature^4)
isotropic
tectonics of Earth
Stephen-Boltzman Law
fewest moons
35. The process similar to conduction by which energy moves from the solar core to the convective layer
Wein's Law
Radiative Diffusion
Open - flat - and closed.
Drake equation
36. IO
Vernal Equinox
isotropic
MOONS: most geologically active
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.
37. A spinning neutron star
Cosmic Microwave Background
Liquid metallic hydrogen
Pulsar
Rich vs poor clusters
38. The lens that gathers the light in a refractor
Objective Lens
How is winding dilemma solved?
meteoriod
Quasar
39. Where is the center of the expansion
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.
Proton-proton chain
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Nucleus
40. A small chunk of rock in space
Hyashi track
Extrasolar Planet
radio lobe
meteoriod
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 toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object
planetesimal
Triple Alpha rocess
accretion disk
Halo
43. The wavelengths where a specific element can absorb or emit light.
Population 1 vs Population 2 stars
Celestial Sphere
Spectral Lines
Nucleus
44. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.
Gamma ray bursts
quasar
Magnification
SETI
45. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.
Wein's Law
Olber's paradox
Spectral Lines
shape and color of SPIRAL galaxies
46. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.
Open Cluster
SETI
Synodic Day
Neutron Star
47. The study of the universe as a whole.
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.
Halo
cosmology
radio lobe
48. A word meaning 'the same everywhere throughout.'
Self-Propogating Star Formation
Ionization
homogeneous
Extrasolar Planet
49. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder
planetesimal
Poor Cluster
Parallax
shape and color of ELLIPTICAL galaxies
50. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere
Differential Rotation
Active Optics
Electron
Cassini division