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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. 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.
Inverse Square Law
Ganymede (Jupiter)
Halo
2. Titan
density parameter
shape and color of ELLIPTICAL galaxies
MOONS: thickest atmosphere
Plank's Law
3. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.
Jupiters red spot
Gamma ray bursts
isotropic
Kuiper belt
4. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy
Sc spiral galaxy
Gamma ray bursts
Ground State
Shepherd satellite
5. A prominence seen against the disk of the sun
Autumnal Equinox
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
Filament
Disk
6. The entity responsible for spiral arms in grand-design spiral galaxies
Summer Solstice
Density Wave
Instability strip
Jupiters red spot
7. A word meaning 'the same everywhere throughout.'
homogeneous
standard candle
Trojan asteroids
Void
8. 10 nm 10^2 nm
Instability strip
Cosmic Microwave Background (CMB)
protostar
Electromagnetic Radiation: X-Ray
9. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)
Spectroscopic Parallax
greatest elongation
differential rotation
300000 KM/sec
10. A particle of light.
fusion crust
Rich Cluster
Photon
radiation pressure
11. A plot of star absolute magnitude verses spectral type.
tectonics of Earth
H-are Diagram
radio lobe
3 reasons we orbit satellites to observe universe
12. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.
Nebula
MOONS: roundest shape
Halo
Density Wave
13. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth
Hubble law
Sa spiral galaxy
HII Region
Supernova (You can be my supernova girl)
14. The science of measuring light energy by wavelength.
Positive - Converge - Greater than 1
fusion crust
Metals
Spectroscopy
15. 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
Spectroscopic parallax
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
Focal Length
Precession
16. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.
Black Hole
Light: travels like a wave - detected like a particle
partile horizon
Sa spiral galaxy
17. The normal eastward movement of a planet against the background of hte distant stars.
Trojan asteroids
Triple Alpha rocess
Spectroscopy
direct motion
18. The study of the universe as a whole.
cosmology
Electromagnetic Radiation: Infrared
Electromagnetic Radiation: Microwave
Convection
19. The mirror that gathers the light in a reflector
Io (jupiters moon)
Primary Mirror
density
Ionization
20. Either Io -Europa - Ganymede - or Callisto
Ground State
Galilean satellite
smallest diameter
CCD
21. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:
Halo
Drake equation
meteor
accretion
22. A change in the appearance of the sun at the edge of the solar disk
Electromagnetic Radiation: Infrared
Limb darkening
Neutron Star
shape and color of SPIRAL galaxies
23. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)
Quasar
Sunspot cycle
highlands
general star population
24. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)
CNO Cycle
radiation dominated universe
meteor shower
open star clusters
25. Earth
greehouse effects
Electron
Most dense
meteor
26. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
OB Associations
MOONS: most geologically active
Positive - Converge - Greater than 1
Continuous Spectrum
27. A point in the sky where meteors appear to come from during a shower
Open Cluster
zone
radiant
resonance
28. What causes the zones and belts on jupiter and saturn?
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
radiation dominated universe
Pulsar
solar nebula
29. A measure of the force of gravity on an object
weight
fastest rotation
chondrite
self-propagating star formation
30. The gap inthe outer portion of Saturn's A ring
Enke gap
Cosmological Principle
acceleration
meteoriod
31. When a planet lines up with the sun inthe sky
conjunction
Wein's Law
Interstellar Extinction
Proton-proton chain
32. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes
Quasar
Planetary Nebula
cosmology
condensation temperature
33. Jupiter - Saturn - Uranus - Neptune
Jovian Planets
Rich Cluster
Sa spiral galaxy
Cepheid variables
34. A small spherical dark nebula
Kuiper belt
Bok Globule
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
Photosphere
35. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:
tectonics of Earth
Drake equation
Spectroscopic Parallax
Differential Rotation
36. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)
mare basalt
Cepheid variables
opposition
Jovian Planets
37. In what chemical form are jupiters nitrogen - carbon and oxygen?
matter dominated universe
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
smallest diameter
Ammonia - methane - and water
38. A word meaning 'the same in all directions.'
isotropic
Objective Lens
Bok Globule
disk
39. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.
widmanstatten pattern
Dark Matter
self-propagating star formation
era of recombination
40. Half of the longest diameter across an ellipse
tectonics of Mars
semimajor axis
interstellar dust
Supernova (You can be my supernova girl)
41. A galaxy sending out a stream of material from its nucleus
Kuiper belt
contrast northern lowlands and the southern highlands of mars...
Radio Galaxy
Granules
42. Elliptical orbits that come inside orbit of the Earth.
Apollo asteroids
Electromagnetic Radiation: Microwave
Emission Spectrum
radiation pressure
43. How did Earth come to have an oxygen rich atmosphere?
H-are Diagram
Proton-proton chain
Biologicla life created the recycling of nitrogen - co2 - and the production of oxygen. Oxygen is heavier so the atmosphere held onto it easier than hydrogen and helium.
Kirchhoff's Law
44. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)
H2 Regions
chondrite
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
era of recombination
45. Europa
Secondary Mirror
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
MOONS: roundest shape
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
46. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR
supernova
Flocculent spirals
Celestial Equator
cosmology
47. What Ole Roemer used to measure the speed of light in a vacuum
Ionization
Eclipses of the Moons of Jupiter
tectonics of Mars
nucleus
48. A plot of star absolute magnitude verses spectral type.
Neutron Star
H-are Diagram
Triple Alpha rocess
Io (jupiters moon)
49. 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.
Open - flat - and closed.
Big Bang
mass
tectonics of Venus
50. Is space infinitely large?
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